Organizations such as companies, enterprises, governments, agencies, firms, associations, etc. may generate, store, and access confidential or other types of sensitive content in networked computing environments. For example, an organization may store confidential documents in cloud/network storage or access confidential information using one or more Software-as-a-Service (SaaS) or remote desktop applications. An organization may grant its employees, agents, partners, or other persons associated with organization (generally referred to as “end users” or “users”) permission to access such applications. An end user may be required to authenticate themselves on a computing device (e.g., client/user device) before accessing the organization's applications and confidential information. For example, a user may unlock their mobile device using a personal identification number (PIN) or biometrics before accessing applications. As another example, a user may log into a desktop or laptop computer by entering a password before accessing applications. A user may be required to re-authenticate themselves after a period of inactivity.
After a user authenticates themselves on a computing device used to access their organization's applications, other persons may be permitted to use the device for special purposes on a limited-time basis. For example, a third-party technician may be invited to fix a problem or perform routine maintenance on an employee's device. As another example, an employee may allow a co-worker to access their laptop to assist with a work task. To allow such people access to the device, the employee (the “authenticated user”) may first authenticate themselves and then hand over physical access of the device to the other person (the “unauthenticated user”). As another example, an employee that uses their personal device for work purposes (i.e., in a so-called “bring your own device” (BYOD) scenario), may handover the device to other family member while the employee had corporate applications opened on the device. This poses a risk as the unauthenticated user may have an opportunity to access the organization's confidential information for an illegitimate purpose, which present technologies do not address. In short, present technologies are an all or nothing proposition. Either a user has no access at all or has access to everything on a given device. This problem is further complicated by authorized users who give up physical control of their device to unauthorized users. Such a scenario completely defeats the security protections offered by present day authentication controls and solutions. Once given access, the unauthorized user has unfettered access to all documents and information for which the authorized user was granted access to. Authorized users can attempt to limit access by closing running applications on the device. However, it may be time-consuming for the authenticated user to save all of their work and then manually close, or logout of, each of the organization's applications before handing over the device to the unauthenticated user. Also, technologies such as password managers and two factor authentication applications still remain accessible to the unauthorized user and thus enable continued access to the authorized user's applications.
According to one aspect of the present disclosure, a method includes: receiving an input by an application executable on a computing device, the application being presented in a first window displayable on the computing device and configured to provide access to another application, and the another application being displayable in a second window different than the first window; and providing by the application a message to the another application to modify access to content of the another application via the computing device in response to receipt of the input by the application, so as to prevent display of the content within the second window of the computing device.
In some embodiments, the method can include modifying a display of the application within the first window to hide content of the application in response to receipt of the input. In some embodiments, the method can include detecting access to the computing device by a user not authenticated by the computing device, wherein the reception of the input by the application includes receiving a notification of the authenticated access. In some embodiments, the detection of the access to the computing device includes analyzing a pattern of user behavior to identify the user. In some embodiments, the detection of the access to the computing device includes using facial recognition to identify the user. In some embodiments, the modification of access to content of the another application includes overlaying one or more windows on the another application. In some embodiments, the modification of access to content of the another application includes disabling a virtual private network (VPN) connection used by the another application. In some embodiments, the VPN connection is a per-app VPN connection used by the another application.
In some embodiments, the providing of the message to the another application includes sending an inter-process communication (IPC) message from the application to the another application. In some embodiments, the method can include: generating a key for the another application; creating a named pipe having a path that includes the key; and sending IPC messages to the another application via the named pipe. In some embodiments, the method can include detecting access to the computing device by a user who is authenticated by the computing device; and allowing access to content of the another application in response to the detecting. In some embodiments, the allowing access to content of the another application includes: providing by the application another message to the another application to allow access to content of the another application.
According to one aspect of the disclosure, a method includes: receiving an input by an application executable on a computing device, the application being presented in a first window displayable on the computing device and configured to provide access to one or more other applications; and configuring, by the application, the computing device to prevent the one or more other applications from executing on the computing device in response to receipt of the input by the application, so as to prevent access to the one or more other applications.
In some embodiments, the method includes detecting access to the computing device by a user not authenticated by the computing device, wherein the receipt of the input by the application includes receiving a notification of the authenticated access. In some embodiments, the detection of the access to the computing device includes analyzing a pattern of user behavior to identify the user. In some embodiments, the detection of the access to the computing device includes using facial recognition to identify the user. In some embodiments, the configuration of the computing device to prevent the one or more other applications from executing includes intercepting a system call to create processes. In some embodiments, the method includes: detecting access to the computing device by a user who is authenticated by the computing device; and configuring, by the application, the computing device to allow the one or more other applications to execute on the computing device.
According to one aspect of the disclosure, an apparatus includes a processor and a non-volatile memory storing computer program code. The computer program code, when executed on the processor, causes the processor to execute a process operable to: receive an input by an application executable on a computing device, the application being presented in a first window displayable on the computing device and configured to provide access to another application, and the another application being displayable in a second window different than the first window; and provide by the application a message to the another application to modify access to content of the another application via the computing device in response to receipt of the input by the application, so as prevent display of the content within the second window of the computing device.
The manner of making and using the disclosed subject matter may be appreciated by reference to the detailed description in connection with the drawings, in which like reference numerals identify like elements.
The drawings are not necessarily to scale, or inclusive of all elements of a system, emphasis instead generally being placed upon illustrating the systems and methods to be protected herein.
Referring now to
In some embodiments, client machines 102A-102N communicate with remote machines 106A-106N via an intermediary appliance 108. The illustrated appliance 108 is positioned between networks 104, 104′ and may also be referred to as a network interface or gateway. In some embodiments, appliance 108 may operate as an application delivery controller (ADC) to provide clients with access to business applications and other data deployed in a datacenter, a cloud computing environment, or delivered as Software as a Service (SaaS) across a range of client devices, and/or provide other functionality such as load balancing, etc. In some embodiments, multiple appliances 108 may be used, and appliance(s) 108 may be deployed as part of network 104 and/or 104′.
Client machines 102A-102N may be generally referred to as client machines 102, local machines 102, clients 102, client nodes 102, client computers 102, client devices 102, computing devices 102, endpoints 102, or endpoint nodes 102. Remote machines 106A-106N may be generally referred to as servers 106 or a server farm 106. In some embodiments, a client device 102 may have the capacity to function as both a client node seeking access to resources provided by server 106 and as a server 106 providing access to hosted resources for other client devices 102A-102N. Networks 104, 104′ may be generally referred to as a network 104. Networks 104 may be configured in any combination of wired and wireless networks.
Server 106 may be any server type such as, for example: a file server; an application server; a web server; a proxy server; an appliance; a network appliance; a gateway; an application gateway; a gateway server; a virtualization server; a deployment server; a Secure Sockets Layer Virtual Private Network (SSL VPN) server; a firewall; a web server; a server executing an active directory; a cloud server; or a server executing an application acceleration program that provides firewall functionality, application functionality, or load balancing functionality.
Server 106 may execute, operate or otherwise provide an application that may be any one of the following: software; a program; executable instructions; a virtual machine; a hypervisor; a web browser; a web-based client; a client-server application; a thin-client computing client; an ActiveX control; a Java applet; software related to voice over internet protocol (VoIP) communications like a soft IP telephone; an application for streaming video and/or audio; an application for facilitating real-time-data communications; a HTTP client; a FTP client; an Oscar client; a Telnet client; or any other set of executable instructions.
In some embodiments, server 106 may execute a remote presentation services program or other program that uses a thin-client or a remote-display protocol to capture display output generated by an application executing on server 106 and transmit the application display output to client device 102.
In yet other embodiments, server 106 may execute a virtual machine providing, to a user of client device 102, access to a computing environment. Client device 102 may be a virtual machine. The virtual machine may be managed by, for example, a hypervisor, a virtual machine manager (VMM), or any other hardware virtualization technique within server 106.
In some embodiments, network 104 may be: a local-area network (LAN); a metropolitan area network (MAN); a wide area network (WAN); a primary public network; and a primary private network. Additional embodiments may include a network 104 of mobile telephone networks that use various protocols to communicate among mobile devices. For short range communications within a wireless local-area network (WLAN), the protocols may include 802.11, Bluetooth, and Near Field Communication (NFC).
Non-volatile memory 128 may include: one or more hard disk drives (HDDs) or other magnetic or optical storage media; one or more solid state drives (SSDs), such as a flash drive or other solid-state storage media; one or more hybrid magnetic and solid-state drives; and/or one or more virtual storage volumes, such as a cloud storage, or a combination of such physical storage volumes and virtual storage volumes or arrays thereof.
User interface 123 may include a graphical user interface (GUI) 124 (e.g., a touchscreen, a display, etc.) and one or more input/output (I/O) devices 126 (e.g., a mouse, a keyboard, a microphone, one or more speakers, one or more cameras, one or more biometric scanners, one or more environmental sensors, and one or more accelerometers, etc.).
Non-volatile memory 128 stores an operating system 115, one or more applications 116, and data 117 such that, for example, computer instructions of operating system 115 and/or applications 116 are executed by processor(s) 103 out of volatile memory 122. In some embodiments, volatile memory 122 may include one or more types of RAM and/or a cache memory that may offer a faster response time than a main memory. Data may be entered using an input device of GUI 124 or received from I/O device(s) 126. Various elements of computing device 100 may communicate via communications bus 150.
The illustrated computing device 100 is shown merely as an example client device or server and may be implemented by any computing or processing environment with any type of machine or set of machines that may have suitable hardware and/or software capable of operating as described herein.
Processor(s) 103 may be implemented by one or more programmable processors to execute one or more executable instructions, such as a computer program, to perform the functions of the system. As used herein, the term “processor” describes circuitry that performs a function, an operation, or a sequence of operations. The function, operation, or sequence of operations may be hard coded into the circuitry or soft coded by way of instructions held in a memory device and executed by the circuitry. A processor may perform the function, operation, or sequence of operations using digital values and/or using analog signals.
In some embodiments, the processor can be embodied in one or more application specific integrated circuits (ASICs), microprocessors, digital signal processors (DSPs), graphics processing units (GPUs), microcontrollers, field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), multi-core processors, or general-purpose computers with associated memory.
Processor 103 may be analog, digital or mixed-signal. In some embodiments, processor 103 may be one or more physical processors, or one or more virtual (e.g., remotely located or cloud computing environment) processors. A processor including multiple processor cores and/or multiple processors may provide functionality for parallel, simultaneous execution of instructions or for parallel, simultaneous execution of one instruction on more than one piece of data.
Communications interfaces 118 may include one or more interfaces to enable computing device 100 to access a computer network such as a Local Area Network (LAN), a Wide Area Network (WAN), a Personal Area Network (PAN), or the Internet through a variety of wired and/or wireless connections, including cellular connections.
In described embodiments, computing device 100 may execute an application on behalf of a user of a client device. For example, computing device 100 may execute one or more virtual machines managed by a hypervisor. Each virtual machine may provide an execution session within which applications execute on behalf of a user or a client device, such as a hosted desktop session. Computing device 100 may also execute a terminal services session to provide a hosted desktop environment. Computing device 100 may provide access to a remote computing environment including one or more applications, one or more desktop applications, and one or more desktop sessions in which one or more applications may execute.
Referring to
In the cloud computing environment 300, one or more clients 102a-102n (such as those described above) are in communication with a cloud network 304. The cloud network 304 may include back-end platforms, e.g., servers, storage, server farms or data centers. The users or clients 102a-102n can correspond to a single organization/tenant or multiple organizations/tenants. More particularly, in one example implementation the cloud computing environment 300 may provide a private cloud serving a single organization (e.g., enterprise cloud). In another example, the cloud computing environment 300 may provide a community or public cloud serving multiple organizations/tenants.
In some embodiments, a gateway appliance(s) or service may be utilized to provide access to cloud computing resources and virtual sessions. By way of example, Citrix Gateway, provided by Citrix Systems, Inc., may be deployed on-premises or on public clouds to provide users with secure access and single sign-on to virtual, SaaS and web applications. Furthermore, to protect users from web threats, a gateway such as Citrix Secure Web Gateway may be used. Citrix Secure Web Gateway uses a cloud-based service and a local cache to check for URL reputation and category.
In still further embodiments, the cloud computing environment 300 may provide a hybrid cloud that is a combination of a public cloud and a private cloud. Public clouds may include public servers that are maintained by third parties to the clients 102a-102n or the enterprise/tenant. The servers may be located off-site in remote geographical locations or otherwise.
The cloud computing environment 300 can provide resource pooling to serve multiple users via clients 102a-102n through a multi-tenant environment or multi-tenant model with different physical and virtual resources dynamically assigned and reassigned responsive to different demands within the respective environment. The multi-tenant environment can include a system or architecture that can provide a single instance of software, an application or a software application to serve multiple users. In some embodiments, the cloud computing environment 300 can provide on-demand self-service to unilaterally provision computing capabilities (e.g., server time, network storage) across a network for multiple clients 102a-102n. By way of example, provisioning services may be provided through a system such as Citrix Provisioning Services (Citrix PVS). Citrix PVS is a software-streaming technology that delivers patches, updates, and other configuration information to multiple virtual desktop endpoints through a shared desktop image. The cloud computing environment 300 can provide an elasticity to dynamically scale out or scale in response to different demands from one or more clients 102. In some embodiments, the cloud computing environment 300 can include or provide monitoring services to monitor, control and/or generate reports corresponding to the provided shared services and resources.
In some embodiments, the cloud computing environment 300 may provide cloud-based delivery of different types of cloud computing services, such as Software as a service (SaaS) 308, Platform as a Service (PaaS) 312, Infrastructure as a Service (IaaS) 316, and Desktop as a Service (DaaS) 320, for example. IaaS may refer to a user renting the use of infrastructure resources that are needed during a specified time period. IaaS providers may offer storage, networking, servers or virtualization resources from large pools, allowing the users to quickly scale up by accessing more resources as needed. Examples of IaaS include AMAZON WEB SERVICES provided by Amazon.com, Inc., of Seattle, Wash., RACKSPACE CLOUD provided by Rackspace US, Inc., of San Antonio, Tex., Google Compute Engine provided by Google Inc. of Mountain View, Calif., or RIGHTSCALE provided by RightScale, Inc., of Santa Barbara, Calif.
PaaS providers may offer functionality provided by IaaS, including, e.g., storage, networking, servers or virtualization, as well as additional resources such as, e.g., the operating system, middleware, or runtime resources. Examples of PaaS include WINDOWS AZURE provided by Microsoft Corporation of Redmond, Wash., Google App Engine provided by Google Inc., and HEROKU provided by Heroku, Inc. of San Francisco, Calif.
SaaS providers may offer the resources that PaaS provides, including storage, networking, servers, virtualization, operating system, middleware, or runtime resources. In some embodiments, SaaS providers may offer additional resources including, e.g., data and application resources. Examples of SaaS include GOOGLE APPS provided by Google Inc., SALESFORCE provided by Salesforce.com Inc. of San Francisco, Calif., or OFFICE 365 provided by Microsoft Corporation. Examples of SaaS may also include data storage providers, e.g. Citrix ShareFile from Citrix Systems, DROPBOX provided by Dropbox, Inc. of San Francisco, Calif., Microsoft SKYDRIVE provided by Microsoft Corporation, Google Drive provided by Google Inc., or Apple ICLOUD provided by Apple Inc. of Cupertino, Calif.
Similar to SaaS, DaaS (which is also known as hosted desktop services) is a form of virtual desktop infrastructure (VDI) in which virtual desktop sessions are typically delivered as a cloud service along with the apps used on the virtual desktop. Citrix Cloud from Citrix Systems is one example of a DaaS delivery platform. DaaS delivery platforms may be hosted on a public cloud computing infrastructure such as AZURE CLOUD from Microsoft Corporation of Redmond, Wash. (herein “Azure”), or AMAZON WEB SERVICES provided by Amazon.com, Inc., of Seattle, Wash. (herein “AWS”), for example. In the case of Citrix Cloud, Citrix Workspace app may be used as a single-entry point for bringing apps, files and desktops together (whether on-premises or in the cloud) to deliver a unified experience.
The client(s) 202 may be any type of computing devices capable of accessing the resource feed(s) 406 and/or the SaaS application(s) 410, and may, for example, include a variety of desktop or laptop computers, smartphones, tablets, etc. The resource feed(s) 406 may include any of numerous resource types and may be provided from any of numerous locations. In some embodiments, for example, the resource feed(s) 406 may include one or more systems or services for providing virtual applications and/or desktops to the client(s) 202, one or more file repositories and/or file sharing systems, one or more secure browser services, one or more access control services for the SaaS applications 410, one or more management services for local applications on the client(s) 202, one or more internet enabled devices or sensors, etc. Each of the resource management service(s) 402, the resource feed(s) 406, the gateway service(s) 408, the SaaS application(s) 410, and the identity provider 412 may be located within an on-premises data center of an organization for which the system 400 is deployed, within one or more cloud computing environments, or elsewhere.
For any of illustrated components (other than the client 202) that are not based within the cloud computing environment 414, cloud connectors (not shown in
As explained in more detail below, in some embodiments, the resource access application 424 and associated components may provide the user 426 with a personalized, all-in-one interface enabling instant and seamless access to all the user's SaaS and web applications, files, virtual Windows applications, virtual Linux applications, desktops, mobile applications, Citrix Virtual Apps and Desktops™, local applications, and other data.
When the resource access application 424 is launched or otherwise accessed by the user 426, the client interface service 416 may send a sign-on request to the identity service 418. In some embodiments, the identity provider 412 may be located on the premises of the organization for which the system 400 is deployed. The identity provider 412 may, for example, correspond to an on-premises Windows Active Directory. In such embodiments, the identity provider 412 may be connected to the cloud-based identity service 418 using a cloud connector (not shown in
In other embodiments (not illustrated in
For each configured resource feed, the resource feed service 420 may request an identity token from the single sign-on service 422. The resource feed service 420 may then pass the feed-specific identity tokens it receives to the points of authentication for the respective resource feeds 406. Each resource feed 406 may then respond with a list of resources configured for the respective identity. The resource feed service 420 may then aggregate all items from the different feeds and forward them to the client interface service 416, which may cause the resource access application 424 to present a list of available resources on a user interface of the client 202. The list of available resources may, for example, be presented on the user interface of the client 202 as a set of selectable icons or other elements corresponding to accessible resources. The resources so identified may, for example, include one or more virtual applications and/or desktops (e.g., Citrix Virtual Apps and Desktops™, VMware Horizon, Microsoft RDS, etc.), one or more file repositories and/or file sharing systems (e.g., Sharefile®, one or more secure browsers, one or more internet enabled devices or sensors, one or more local applications installed on the client 202, and/or one or more SaaS applications 410 to which the user 426 has subscribed. The lists of local applications and the SaaS applications 410 may, for example, be supplied by resource feeds 406 for respective services that manage which such applications are to be made available to the user 426 via the resource access application 424. Examples of SaaS applications 410 that may be managed and accessed as described herein include Microsoft Office 365 applications, SAP SaaS applications, Workday applications, etc.
For resources other than local applications and the SaaS application(s) 410, upon the user 426 selecting one of the listed available resources, the resource access application 424 may cause the client interface service 416 to forward a request for the specified resource to the resource feed service 420. In response to receiving such a request, the resource feed service 420 may request an identity token for the corresponding feed from the single sign-on service 422. The resource feed service 420 may then pass the identity token received from the single sign-on service 422 to the client interface service 416 where a launch ticket for the resource may be generated and sent to the resource access application 424. Upon receiving the launch ticket, the resource access application 424 may initiate a secure session to the gateway service 408 and present the launch ticket. When the gateway service 408 is presented with the launch ticket, it may initiate a secure session to the appropriate resource feed and present the identity token to that feed to seamlessly authenticate the user 426. Once the session initializes, the client 202 may proceed to access the selected resource.
When the user 426 selects a local application, the resource access application 424 may cause the selected local application to launch on the client 202. When the user 426 selects a SaaS application 410, the resource access application 424 may cause the client interface service 416 request a one-time uniform resource locator (URL) from the gateway service 408 as well a preferred browser for use in accessing the SaaS application 410. After the gateway service 408 returns the one-time URL and identifies the preferred browser, the client interface service 416 may pass that information along to the resource access application 424. The client 202 may then launch the identified browser and initiate a connection to the gateway service 408. The gateway service 408 may then request an assertion from the single sign-on service 422. Upon receiving the assertion, the gateway service 408 may cause the identified browser on the client 202 to be redirected to the logon page for identified SaaS application 410 and present the assertion. The SaaS may then contact the gateway service 408 to validate the assertion and authenticate the user 426. Once the user has been authenticated, communication may occur directly between the identified browser and the selected SaaS application 410, thus allowing the user 426 to use the client 202 to access the selected SaaS application 410.
In some embodiments, the preferred browser identified by the gateway service 408 may be a specialized browser embedded in the resource access application 424 (when the resource application is installed on the client 202) or provided by one of the resource feeds 406 (when the resource application 424 is located remotely), e.g., via a secure browser service. In such embodiments, the SaaS applications 410 may incorporate enhanced security policies to enforce one or more restrictions on the embedded browser. Examples of such policies include (1) requiring use of the specialized browser and disabling use of other local browsers, (2) restricting clipboard access, e.g., by disabling cut/copy/paste operations between the application and the clipboard, (3) restricting printing, e.g., by disabling the ability to print from within the browser, (3) restricting navigation, e.g., by disabling the next and/or back browser buttons, (4) restricting downloads, e.g., by disabling the ability to download from within the SaaS application, and (5) displaying watermarks, e.g., by overlaying a screen-based watermark showing the username and IP address associated with the client 202 such that the watermark will appear as displayed on the screen if the user tries to print or take a screenshot. Further, in some embodiments, when a user selects a hyperlink within a SaaS application, the specialized browser may send the URL for the link to an access control service (e.g., implemented as one of the resource feed(s) 406) for assessment of its security risk by a web filtering service. For approved URLs, the specialized browser may be permitted to access the link. For suspicious links, however, the web filtering service may have the client interface service 416 send the link to a secure browser service, which may start a new virtual browser session with the client 202, and thus allow the user to access the potentially harmful linked content in a safe environment.
In some embodiments, in addition to or in lieu of providing the user 426 with a list of resources that are available to be accessed individually, as described above, the user 426 may instead be permitted to choose to access a streamlined feed of event notifications and/or available actions that may be taken with respect to events that are automatically detected with respect to one or more of the resources. This streamlined resource activity feed, which may be customized for each user 426, may allow users to monitor important activity involving all of their resources—SaaS applications, web applications, Windows applications, Linux applications, desktops, file repositories and/or file sharing systems, and other data through a single interface, without needing to switch context from one resource to another. Further, event notifications in a resource activity feed may be accompanied by a discrete set of user-interface elements, e.g., “approve,” “deny,” and “see more detail” buttons, allowing a user to take one or more simple actions with respect to each event right within the user's feed. In some embodiments, such a streamlined, intelligent resource activity feed may be enabled by one or more micro-applications, or “microapps,” that can interface with underlying associated resources using APIs or the like. The responsive actions may be user-initiated activities that are taken within the microapps and that provide inputs to the underlying applications through the API or other interface. The actions a user performs within the microapp may, for example, be designed to address specific common problems and use cases quickly and easily, adding to increased user productivity (e.g., request personal time off, submit a help desk ticket, etc.). In some embodiments, notifications from such event-driven microapps may additionally or alternatively be pushed to clients 202 to notify a user 426 of something that requires the user's attention (e.g., approval of an expense report, new course available for registration, etc.).
In some embodiments, a microapp may be a single use case made available to users to streamline functionality from complex enterprise applications. Microapps may, for example, utilize APIs available within SaaS, web, or home-grown applications allowing users to see content without needing a full launch of the application or the need to switch context. Absent such microapps, users would need to launch an application, navigate to the action they need to perform, and then perform the action. Microapps may streamline routine tasks for frequently performed actions and provide users the ability to perform actions within the resource access application 424 without having to launch the native application. The system shown in
Referring to
In some embodiments, the microapp service 430 may be a single-tenant service responsible for creating the microapps. The microapp service 430 may send raw events, pulled from the systems of record 428, to the analytics service 438 for processing. The microapp service may, for example, periodically pull active data from the systems of record 428.
In some embodiments, the active data cache service 436 may be single-tenant and may store all configuration information and microapp data. It may, for example, utilize a per-tenant database encryption key and per-tenant database credentials.
In some embodiments, the credential wallet service 434 may store encrypted service credentials for the systems of record 428 and user OAuth2 tokens.
In some embodiments, the data integration provider service 432 may interact with the systems of record 428 to decrypt end-user credentials and write back actions to the systems of record 428 under the identity of the end-user. The write-back actions may, for example, utilize a user's actual account to ensure all actions performed are compliant with data policies of the application or other resource being interacted with.
In some embodiments, the analytics service 438 may process the raw events received from the microapps service 430 to create targeted scored notifications and send such notifications to the notification service 440.
Finally, in some embodiments, the notification service 440 may process any notifications it receives from the analytics service 438. In some implementations, the notification service 440 may store the notifications in a database to be later served in a notification feed. In other embodiments, the notification service 440 may additionally or alternatively send the notifications out immediately to the client 202 as a push notification to the user 426.
In some embodiments, a process for synchronizing with the systems of record 428 and generating notifications may operate as follows. The microapp service 430 may retrieve encrypted service account credentials for the systems of record 428 from the credential wallet service 434 and request a sync with the data integration provider service 432. The data integration provider service 432 may then decrypt the service account credentials and use those credentials to retrieve data from the systems of record 428. The data integration provider service 432 may then stream the retrieved data to the microapp service 430. The microapp service 430 may store the received systems of record data in the active data cache service 436 and also send raw events to the analytics service 438. The analytics service 438 may create targeted scored notifications and send such notifications to the notification service 440. The notification service 440 may store the notifications in a database to be later served in a notification feed and/or may send the notifications out immediately to the client 202 as a push notification to the user 426.
In some embodiments, a process for processing a user-initiated action via a microapp may operate as follows. The client 202 may receive data from the microapp service 430 (via the client interface service 416) to render information corresponding to the microapp. The microapp service 430 may receive data from the active data cache service 436 to support that rendering. The user 426 may invoke an action from the microapp, causing the resource access application 424 to send that action to the microapp service 430 (via the client interface service 416). The microapp service 430 may then retrieve from the credential wallet service 434 an encrypted Oauth2 token for the system of record for which the action is to be invoked, and may send the action to the data integration provider service 432 together with the encrypted Oath2 token. The data integration provider service 432 may then decrypt the Oath2 token and write the action to the appropriate system of record under the identity of the user 426. The data integration provider service 432 may then read back changed data from the written-to system of record and send that changed data to the microapp service 430. The microapp service 432 may then update the active data cache service 436 with the updated data and cause a message to be sent to the resource access application 424 (via the client interface service 416) notifying the user 426 that the action was successfully completed.
In some embodiments, in addition to or in lieu of the functionality described above, the resource management services 402 may provide users the ability to search for relevant information across all files and applications. A simple keyword search may, for example, be used to find application resources, SaaS applications, desktops, files, etc. This functionality may enhance user productivity and efficiency as application and data sprawl is prevalent across all organizations.
In other embodiments, in addition to or in lieu of the functionality described above, the resource management services 402 may enable virtual assistance functionality that allows users to remain productive and take quick actions. Users may, for example, interact with the “Virtual Assistant” and ask questions such as “What is Bob Smith's phone number?” or “What absences are pending my approval?” The resource management services 402 may, for example, parse these requests and respond because they are integrated with multiple systems on the back-end. In some embodiments, users may be able to interact with the virtual assistance through either the resource access application 424 or directly from another resource, such as Microsoft Teams. This feature may allow employees to work efficiently, stay organized, and deliver only the specific information being sought.
Managed applications 504 can include any applications that an organization provides or otherwise makes available to users associated with the organization so that the users can execute their assigned roles within the organization or otherwise provide some benefit to the organization. In many cases, managed applications be used to access information that is confidential to the organization. The term “managed application” as used herein is not limited to any particular type or category of application. Managed applications 504 can include native applications (e.g., MICROSOFT WORD), web-based applications (e.g., SALESFORCE and other SaaS applications), and virtual applications and desktops running on remote virtual desktop infrastructure. In the case of a web-based application, a managed application 504 can run inside a web browser, such as within a secure web browser provided by within resource access application 502. In the case of a virtual application/desktop, a managed application 504 can be accessed using a remote display client (or “engine”) provided by resource access application 502. In the case of a native application, a managed application 504 can be installed on the user device 500 as mobile or desktop app separate and apart from resource access application 502. While three (3) managed applications 504a-c are shown in
User device 500 can have installed on it both managed applications 504 and other applications 505. Other applications 500 can include, for example, applications that are bundled with the OS 506 such as the Calculator and Photos applications bundled with WINDOWS, applications that a user of the device 500 installed themselves for their personal use such as social media apps and streaming media apps, or any other applications not used to benefit the organization.
Managed applications 504 can communicate with remote systems, servers, and applications over one or more public and/or private computer networks. For example, as shown in
Resource access application 502, which may be the same as or similar to resource access application 424 of
In some embodiments, a user can launch a managed application 504 from outside of resource access application 502, using a shell application such as WINDOWS EXPLORER, MACOS FINDER, a console/terminal application, or other graphical or text-based shell application. The shell application can be provided as part of OS 506 or as a third-party application. Disclosed embodiments can be used to modify access to applications launched by resource access application 502 and to applications launched outside of resource access application 502.
Resource access application 502 can modify access to managed applications 504 and/or itself to protect the organization's confidential data when an unauthenticated user (e.g., a technician or co-worker) is accessing the device 500. The structures and techniques described hereinbelow enable a user to protect the organization's confidential data on their device without having to save all their work and shutdown all managed applications running on the device.
Resource access application 502 can modify access to managed applications 504 and/or to itself in response various types of inputs. Access modification techniques described herein can be generally classified as techniques for locking applications or for unlocking applications. Applications can be locked and unlocked in response to various types of inputs. For example, a user may manually lock and unlock applications by clicking “Lock” and “Unlock” buttons within resource access application 502. As another example, applications can be locked/unlocked in response to messages received from a remote server, such as resource management service 402 of
As one example of a threat assessment technique that can be used to lock/unlock applications, resource access application 502 can monitor user inputs (e.g., keystrokes, mouse movements, or touch inputs) to detect that a person accessing the user device 500 is not an authenticated user. In more detail, resource access application 502 to access behavioral model(s) associated with one or more users that have authentication credentials on the device 500. When a particular user authenticates themselves with the device, resource access application 502 can begin capturing user inputs and comparing the inputs to the model to make a probabilistic determination whether the person using the device is the authenticated user or a different user (e.g., a technician, co-worker, etc.). Various techniques and metrics can be used to determine whether the person using the device is the authenticated user or a different user. For example, resource access application 502 can monitor keystrokes to calculate a user's average typing speed (e.g., in words-per-minute), average key-press duration, average duration between key presses, or rate of key rollover (i.e., multiple keys pressed at the same time), etc. As another example, resource access application 502 can monitor mouse movements to calculate, for example, average mouse pointer velocity. Such metrics can be calculated and stored an authenticated user of the device, and later used to determine of a person accessing the device presents a risk to the organization. In some embodiments, resource access application 502 can utilize machine learning (ML) models (e.g., neural networks) to process user input and make classifications or decisions based on a combination of the user inputs or features determined therefrom. If the captured user input is inconsistent with the authenticated user's behavior model, resource access application 502 can lock applications 502, 504 based on the assumption that an unauthenticated person is accessing the device 500. As another example of a threat assessment technique that can be used to automatically lock applications, resource access application 502 can use biometric data such as fingerprint scan data or facial recognition data to detect that a person accessing the user device 500 is not an authenticated user and, in response, to lock applications 502, 504.
In some embodiments, resource access application 502 can use one or more of the aforementioned threat assessment techniques to calculate a score (e.g., a risk score) indicating a likelihood that a person accessing the device 500 is an unauthenticated user and/or someone that is likely to pose a threat to the organization. If the score exceeds a certain threshold value, resource access application 502 can lock (e.g., automatically lock) applications 502, 504, while leaving other applications 505 unlocked. The threshold can be set by an organization as part of a security policy. The security policy can indicate which applications, or categories of applications, are to have their access modified when a threshold is exceeded. A security policy can define multiple different thresholds for different applications or categories of applications. In some embodiments, a resource management service (e.g., resource management service 402 of
Several techniques for locking applications 504, 502 are described next. It should be understood that the systems and methods sought to be protected herein are not limited to any particular techniques for modifying access to applications and that multiple such techniques can be used in combination.
As one example of a locking technique, resource access application 502 can cause a window to be overlaid onto one or more managed applications 504 and/or onto resource access application 502 itself. The overlay window(s) may be configured in terms of size, position, color, opacity, etc. to prevent the contents of applications 504, 502 from being visible or otherwise discernable to users, thereby rendering them unusable. For example, the overlay windows can be opaque and can be sized and positioned to cover most or all of the application windows displayed by applications 504, 502. The overlay windows may be configured to block access to managed applications 504 and/or resource access application 502 while allowing other applications to remain accessible on user device 500. For example, on a WINDOWS device, the WINDOWS EXPLORER shell application may remain accessible while applications 504, 502 are blocked from view. In this way, a technician, co-worker, or other invited person can access the user device 500 but not the organization's applications or confidential data. The overlay windows can be created by resource access application 502 or by the managed applications 504 using the OS's window management functions 508, as described further below in the context of
As another example of a locking technique, resource access application 502 can block network traffic to/from a managed application 504 (or to/from resource application 502 itself) to prevent confidential information from being accessed on the user device 500. As illustrated in
As another example of a locking technique, resource access application 502 can secure user device 500 by blocking the creation of managed application 504 processes. During normal operation, the OS's process management functions 514 can create new application processes in response to, for example, a user input. For example, as illustrated in
Authentication module 602 can authenticate users on the device using various authentication techniques such as PIN-based authentication, password-based authentication, facial recognition, or multi-factor authentication. Authentication module 602 compare a user input (e.g., a PIN or password entry) against user credentials 620 to make authentication determinations. In some embodiments, authentication module 602 may connect to a remote server to authenticate users. In some embodiments, authentication module 602 can use an authentication mechanism provided by the device's OS.
As previously mentioned, a resource access application can provide users with access to various types of applications including native applications (e.g., WINDOWS applications or mobile applications installed on the device), web-based applications, and virtual applications and desktops. Process manager 604 can launch native applications as child processes of the resource access application 600 and keep track of which native application processes are running. In some embodiments, process manager 604 can monitor and maintain a list of process identifiers (PIDs) for the native applications processes and use this information to modify access to said processes using IPC. Process manager 604 can also track any processes it creates for accessing web-based and virtual applications. In addition to tracking the process identifiers of running application processes, process manager 604 can keep track of unique keys generated for secure IPC with those processes, and the locked state of individual processes (e.g., locked vs. unlocked). In some embodiments, process manager 604 can cause native applications to run with a shared library loaded thereinto. The shared library (or “hook library”) can include one or more functions that can be used to modify access to the applications, as discussed further below in the context of
Secure browser 606 can include an embedded browser (e.g., a CHROMIUM-based browser) for launching SaaS applications and other web-based applications. Remote display client 608 can include an ICA (Independent Computing Architecture) client, RDP (Remote Desktop Protocol) client, or other remote display client for accessing virtual desktops and applications. In some embodiments, resource access application 600 can lock web-based applications running within secure browser 606 and virtual applications accessed via remote display client 608 by displaying an overlay window over resource access application 600 or portions thereof. As another example, resource access application 600 can selectively disable a per-app VPN used by secure browser 606 and/or remote display client 608.
Lock UI module 610 can include UI controls for modifying access to applications on the user device. For example, lock UI module 610 can display buttons or other controls for locking and unlocking applications on the device.
Threat assessment module 612 can calculate a score (e.g., a risk score) using various techniques disclosed herein and, based on the risk score and the organization's security policy, can cause applications on the device to be automatically locked. In some implementation, threat assessment module may receive the score or the action to lock/unlock from a resource management service (e.g., resource management service 402 of
Managed applications IPC module 614 can include functions to securely communicate with managed applications via named pipes, sockets, shared memory, or another IPC mechanism. For example, as discussed further below in the context of
Hook library 708 includes one or more functions to enable locking and unlocking of the managed application 700 in response to inputs received by the user device. As previously discussed, a managed application 700 can correspond to a native application, a web-based application (e.g., a SaaS application), or a virtual application. For a web-based application, managed application 700 may run inside of a browser (e.g., a secure browser) provided by a resource access application (e.g., resource access application 516 of
As illustrated in
The managed application 700 illustrated in
Referring to
Turning to
In some embodiments, an overlay window need not leverage tree structure or other hierarchical structure and can instead be overlayed by adjusting the window or UI element attributes such as dimensions, location, z-order etc.
In some embodiments, one or more UI controls can be presented along with the overlay window 814. For example, as shown in
Referring to
Turning to
As shown in
Before process 1000 is performed, a user may have authenticated themselves with the resource access application running on a user device (e.g., user device 500 of
Referring now to
At block 1004, the resource access application sends a message to one or more managed applications to cause those applications to become locked. For example, the resource access application can send an IPC message (e.g., via a named pipe server) to one or more managed applications within the list of application processes maintained by the resource access application. The message may instruct the managed applications to lock themselves by, for example, creating overlay windows or disabling per-app VPNs as previously discussed. The messages can be received and processed by a hook library loaded into the managed applications. In the case of an overlay window, a managed application can also present UI controls (e.g., a password input and an “Unlock” button) to enable the user to authenticate themselves and unlock that individual application.
At block 1006, the resource access application can optionally lock itself by creating an overlay window. The resource access application's overlay window can be presented along with UI controls (e.g., a password input and an “Unlock All” button) to enable the user to authenticate themselves and unlock the resource access application and managed applications. In some embodiments, the resource access application may provide UI controls for unlocking individual managed applications.
At block 1008, the resource access application and/or individual managed applications can authenticate a user of the device. Various authentication techniques can be used, such as entering a PIN code, entering a password, using facial recognition, completing multi-factor authentication, etc. In some embodiments, the resource access application or managed application can invoke an authentication function provided by the OS, such as the CredUIPromptForCredentials function provided by WINDOWS.
At block 1010, the managed applications can be unlocked in response to a successful user authentication. In the case where the user chose to unlock all applications from the resource access application (e.g., by clicking the “Unlock All” button), the resource access application can send another IPC message to the managed applications instructing the managed applications to unlock themselves by, for example, remove their overlay windows or re-establishing their per-app VPNs. In the case where the user chose to unlock an individual application from the resource access application, the resource access application can send an IPC unlock message to that individual application. In the case where a user chose to unlock an individual managed application from within that application itself, the application can remove its overlay window or re-establish its per-app VPN directly in response to the user action.
At block 1012, the resource access application can optionally unlock itself in response to a successful user authentication, for example by removing its overlay window.
At line 1008, user 1002 launches resource access application 1004 and logs in using an authentication mechanism provided by the resource access application 1004. At 1010, resource access application 1004 starts a named pipe server using the OS's IPC functions. This named pipe server (“first named pipe server”) may have a path (e.g., a predetermined path), such as \\pipe\resource-access-app. The path can be hardcoded within or otherwise known to both resource access application 1004 and managed application 1006. In some embodiments, the predetermined named pipe server path can be hardcoded within a hook library that is loaded into managed application 1006.
At line 1012, user 1002 performs an action to request launching of managed application 1006. For example, the user may click/tap on a corresponding app icon within resource access application 1004.
In response, at line 1014, resource access application 1004 launches the managed application 1006. In some embodiments, resource access application 1004 can use the OS's CreateProcess function to create a new application process, with the resource access application being the parent owner of the new process. Resource access application 1004 can obtain a process identifier or other unique identifier of the new process from the OS and store the process identifier in a list of running applications (e.g., in a list that it maintains).
At line 1016, managed application 1006 connects to the first named pipe server using the path and sends an IPC message to the resource access application 1004 requesting a unique key. The IPC message can include various information identifying the managed application process such as the managed application's process identifier, name, path, etc. In some embodiments, a hook library loaded into managed application 1006 is configured to automatically send this IPC message the managed application process starts.
At line 1018, resource access application 1004 generates a key (e.g., a unique key) for managed application 1006. The resource access application 1004 can store the key in the list of running processes, associated with managed application's process identifier. In some embodiments, resource access application 1004 can verify that the process identifier is included the IPC message (line 1016) matches one of the process identifiers in its list of running application process. In some embodiments, the process name, path, or other information describing the process can be used instead of the process identifier.
At line 1020, resource access application 1004 sends the key to managed application 1006 via the first named pipe server.
At line 1022, managed application 1006 starts another named pipe server (“second named pipe server”) using the key received from resource access application 1004. In more detail, managed application 1006 constructs a path for the second named piper server that includes the key and, optionally, the managed application's process identifier. For example, the second named pipe server can have a path such as \\pipe\managed-app-{processid}-{key}, where {processid} represents the managed application's process identifier and {key} represents the key shared between the resource access application 1004 and the managed application 1006.
At line 1024, user 1002 generates an input to lock one or more managed applications. For example, user 1002 can click a “Lock” button within resource access application 1004. Other types of inputs that can result in locking of applications are described above in the context of
At line 1026, in response to the input, resource access application 1004 connects to the second named pipe server and sends an IPC message (“lock message”) instructing managed application 1006 to lock itself. To connect to the second named pipe server, resource access application 1004 constructs the path (e.g., \\pipe\managed-app-{processid}-{key}) using the key and process identifier stored in its list of running application. Resource access application 1004 can repeat this step for multiple managed applications to be locked.
At line 1028, managed application 1006 validates the lock message and performs one or more actions to modify access to the managed application. For example, if the lock message is valid, managed application 1006 (or, more particularly, a hook library loaded thereinto) can create an overlay window or disable a per-app VPN used by the managed application. Various techniques can be used to validate the lock message. For example, managed application 1006 can verify that the lock message was received from a known/trusted process such as resource access application 1004. As another example, managed application 1006 can validate the structure and content of the lock message and/or validate a sequence number of the message.
At line 1030, user 1002 generates another input to unlock one or more managed applications. For example, user 1002 can click an “Unlock All” button within resource access application 1004. In response, at line 1032, resource access application 1004 re-authenticates the user using any of the authentication techniques discussed herein.
At line 1034, in response to a successful user authentication, resource access application 1004 connects to the second named pipe server and sends an IPC message (“unlock message”) instructing managed application 1006 to unlock itself. Resource access application 1004 can repeat this step for multiple managed applications to be unlocked.
At line 1036, managed application 1006 validates the unlock message and performs one or more actions to modify access to the managed application. For example, if the unlock message is valid, managed application 1006 (or, more particularly, a hook library loaded thereinto) can remove/hide an overlay window or re-establish the per-app VPN.
In other embodiments, managed application 1006 may not create a unique named pipe but instead utilize the named pipe server created by resource access application 1004 (e.g., at line 1010). For example, resource access application 1004 can use any IPC mechanism to signal to managed application 1006 (or, more particularly, to a hook library loaded therein) that a message is available. Managed application 1006 can then request the message from resource access application 1004 using its named pipe server. Resource access application 1004 can validate the request and, upon successful validation, can return a lock/unlock message to the managed application 1006.
In the example shown, a helper module 1210 may be distributed with resource access application 1204 to provide enhanced, system-level functionality that enables resource access application 1204 to modify access to managed applications on the device 1200. During installation of the resource access application 1204 by an administrator, helper module 1210 can be installed and configured to be loaded into the kernel 1206. According to some embodiments, helper module 1210 can be configured to selectively block (or “trap”) CreateProcess calls normally handled by the kernel's process management functions 1208. Resource access application 1204 can configure helper module 1210 to block particular applications by sending a control message to helper module 1210 that includes a list of applications to be blocked. The control messages may be in the form of, for example, IOCTL (input/output control) messages. A control message can specify applications to block by name, binary path, image signature, or other application details known to resource access application 1204. For example, resource access application 1204 can maintain a list of managed applications installed on the user device 1200 and, in response to an input, can send a control message to helper module 1210 to block instances of those managed applications from launching. Resource access application 1204 can similarly send control messages to helper module 1210 to unblock applications.
Referring to
Turning to
While the example of
The disclosed structures and techniques for blocking CreateProcess call can be used alone or in combination with the other application locking techniques disclosed herein. For example, concurrent with sending control message 1224 to helper module 1210, resource access application 1204 can send IPC message to one or more running managed applications to cause those applications to lock themselves by displaying overlay windows and/or disabling per-app VPNs.
The following examples pertain to further embodiments, from which numerous permutations and configurations will be apparent.
Example 1 includes a method including: receiving an input by an application executable on a computing device, the application being presented in a first window displayable on the computing device and configured to provide access to another application, and the another application being displayable in a second window different than the first window; and providing by the application a message to the another application to modify access to content of the another application via the computing device in response to receipt of the input by the application, so as to prevent display of the content within the second window of the computing device.
Example 2 includes the subject matter of Example 1 and further includes modifying a display of the application within the first window to hide content of the application in response to receipt of the input.
Example 3 includes the subject matter of Example 1 and further includes detecting access to the computing device by a user not authenticated by the computing device, wherein the reception of the input by the application includes receiving a notification of the authenticated access.
Example 4 includes the subject matter of Example 3, wherein the detection of the access to the computing device includes analyzing a pattern of user behavior to identify the user.
Example 5 includes the subject matter of Example 3, wherein the detection of the access to the computing device includes using facial recognition to identify the user.
Example 6 includes the subject matter of Example 1, wherein the modification of access to content of the another application includes overlaying one or more windows on the another application.
Example 7 includes the subject matter of Example 1, wherein the modification of access to content of the another application includes disabling a virtual private network (VPN) connection used by the another application.
Example 8 includes the subject matter of Example 7, wherein the VPN connection is a per-app VPN connection used by the another application.
Example 9 includes the subject matter of Example 1, wherein the providing of the message to the another application includes sending an inter-process communication (IPC) message from the application to the another application.
Example 10 includes the subject matter of Example 9, and further includes: generating a key for the another application; creating a named pipe having a path that includes the key; and sending IPC messages to the another application via the named pipe.
Example 11 includes the subject matter of Example 1, and further includes: detecting access to the computing device by a user who is authenticated by the computing device; and allowing access to content of the another application in response to the detecting.
Example 12 includes the subject matter of Example 11, wherein the allowing access to content of the another application includes: providing by the application another message to the another application to allow access to content of the another application.
Example 13 includes a method including: receiving an input by an application executable on a computing device, the application being presented in a first window displayable on the computing device and configured to provide access to one or more other applications; and configuring, by the application, the computing device to prevent the one or more other applications from executing on the computing device in response to receipt of the input by the application, so as to prevent access to the one or more other applications.
Example 14 includes the subject matter of Example 13 and further includes detecting access to the computing device by a user not authenticated by the computing device, wherein the receipt of the input by the application includes receiving a notification of the authenticated access.
Example 15 includes the subject matter of Example 14, wherein the detection of the access to the computing device includes analyzing a pattern of user behavior to identify the user.
Example 16 includes the subject matter of Example 14, wherein the detection of the access to the computing device includes using facial recognition to identify the user.
Example 17 includes the subject matter of Example 13, wherein the configuration of the computing device to prevent the one or more other applications from executing includes intercepting a system call to create processes.
Example 18 includes the subject matter of Example 13, and further includes: detecting access to the computing device by a user who is authenticated by the computing device; and configuring, by the application, the computing device to allow the one or more other applications to execute on the computing device.
Example 19 includes an apparatus having a processor and a non-volatile memory storing computer program code. The computer program code, when executed on the processor, causes the processor to execute a process operable to: receive an input by an application executable on a computing device, the application being presented in a first window displayable on the computing device and configured to provide access to another application, and the another application being displayable in a second window different than the first window; and provide by the application a message to the another application to modify access to content of the another application via the computing device in response to receipt of the input by the application, so as prevent display of the content within the second window of the computing device.
The subject matter described herein can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structural means disclosed in this specification and structural equivalents thereof, or in combinations of them. The subject matter described herein can be implemented as one or more computer program products, such as one or more computer programs tangibly embodied in an information carrier (e.g., in a machine-readable storage device), or embodied in a propagated signal, for execution by, or to control the operation of, data processing apparatus (e.g., a programmable processor, a computer, or multiple computers). A computer program (also known as a program, software, software application, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or another unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file. A program can be stored in a portion of a file that holds other programs or data, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub programs, or portions of code). A computer program can be deployed to be executed on one computer or on multiple computers at one site or distributed across multiple sites and interconnected by a communication network.
The processes and logic flows described in this specification, including the method steps of the subject matter described herein, can be performed by one or more programmable processors executing one or more computer programs to perform functions of the subject matter described herein by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus of the subject matter described herein can be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit).
Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processor of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical disks, or optical disks. Information carriers suitable for embodying computer program instructions and data include all forms of nonvolatile memory, including by ways of example semiconductor memory devices, such as EPROM, EEPROM, flash memory device, or magnetic disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.
In the foregoing detailed description, various features are grouped together in one or more individual embodiments for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that each claim requires more features than are expressly recited therein. Rather, inventive aspects may lie in less than all features of each disclosed embodiment.
The disclosed subject matter is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The disclosed subject matter is capable of other embodiments and of being practiced and carried out in various ways. As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods, and systems for carrying out the several purposes of the disclosed subject matter. Therefore, the claims should be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the disclosed subject matter.
Although the disclosed subject matter has been described and illustrated in the foregoing exemplary embodiments, it is understood that the present disclosure has been made only by way of example, and that numerous changes in the details of implementation of the disclosed subject matter may be made without departing from the spirit and scope of the disclosed subject matter.
All publications and references cited herein are expressly incorporated herein by reference in their entirety.