Claims
- 1. A digital mark certification system for providing a mark for data certification based on a digital mark, comprising:
a mark management processor for embedding certification information of a mark creation demander in a demander's mark design to create a visible mark on a display in response to demander's request; and a mark distributor for distributing a decoding key for decoding of the mark and the visible mark to a demander's terminal device.
- 2. A system as set forth in claim 1, comprising a decoding key management database for storing the decoding key therein and a decoding key management processor for transmitting the decoding key to a plurality of mark terminal devices connected to the mark management server.
- 3. A system as set forth in claim 1, wherein it can be visually recognized on the display that the certification information is embedded in the created mark.
- 4. A system as set forth in claim 1, wherein the certification information is obtained by encrypting information including a demander's feature with use of a cryptograph key.
- 5. A system as set forth in claim 1, wherein the mark management processor encrypts information including demander's other feature with use of the cryptograph key to create other certification information of the demander in response to a mark updating request and embeds the other certification information in demander's mark design to create the mark.
- 6. A system as set forth in claim 1, wherein, in response to the mark creating request, the mark management processor embeds in the mark design the other certification information that it cannot be visually recognized on the display that the other certification information is embedded in the mark.
- 7. A system as set forth in claim 6, wherein the certification information and the other certification information are embedded in different positions divided in the mark.
- 8. A terminal device for attaching a mark for data certification based on a digital mark to digital data, comprising:
a mark processor for transmitting a mark creation request to a digital mark certification system, for receiving from the system a mark obtained by encrypting information including demander's feature with use of a cryptograph key and embedding the certification information in demander's mark design, and for storing the mark therein; a decoding key database for receiving and storing a decoding key for decoding of the mark; and a transmitter for encrypting log information on the digital data with use of the cryptograph key, embedding the encrypted log information in the mark, and transmitting the mark together with the digital data.
- 9. An electronic seal authentication system comprising:
at least one client terminal; and at least one mark management server for managing a mark to be used at the client terminal, wherein the mark management server, when receiving a mark registration or modification request from the client terminal, embeds information necessary for identity authentication of a digital data creator in the mark and transmits the information-embedded mark to the client terminal, and the client terminal includes means for embedding information necessary for document certification of the digital data in the mark and means for performing either one of both of the identity authentication and document certification of the digital data.
- 10. An electronic seal authentication system as set forth in claim 9, wherein the means for performing either one or both of the identity authentication and document certification creates a visible seal mark by adding the information necessary for identity authentication in one of blocks of data of an image at the time of issuing the mark and by adding the information necessary for the document certification in another one of the blocks at the time of sending the document.
- 11. A digital mark authentication method for providing a mark for data certification based on a digital mark comprising:
a step of embedding certification information of a mark creation demander in a demander's mark design to create a visible mark on a display in response to demander's request; and a step of distributing a decoding key for decoding of the mark and the visible mark to a demander's terminal device.
- 12. A method as set forth in claim 11, comprising a step of transmitting the decoding key to a plurality of mark terminal devices connected to the mark management server from a decoding key management database for storage of the decoding key.
- 13. A method as set forth in claim 11, wherein it can be visually recognized on the display that the certification information is embedded in the created mark.
- 14. A method as set forth in claim 11, comprising a step of encrypting information including a demander's feature with use of a cryptograph key to obtain the certification information.
- 15. A method as set forth in claim 11, comprising a step of encrypting information including demander's other feature with use of the cryptograph key to create other certification information of the demander in response to a mark updating request and embedding the other certification information in demander's mark design to create the mark.
- 16. A method as set forth in claim 11, comprising a step of, in response to the mark creation request, embedding in the mark design the other certification information that it cannot be visually recognized on the display that the other certification information is embedded in the mark.
- 17. A method as set forth in claim 16, wherein the certification information and the other certification information are embedded in different positions divided in the mark.
- 18. A method for operating a terminal device for attaching a mark for data certification based on a digital mark to digital data, comprising:
a step of transmitting a mark creation request to a digital mark certification system, for receiving from the system a mark obtained by encrypting information including demander's feature with use of a cryptograph key and embedding the certification information in demander's mark design, and for storing the mark therein; a step of receiving and storing a decoding key for decoding of the mark; and a step of encrypting log information on the digital data with use of the cryptograph key, embedding the encrypted log information in the mark, and transmitting the mark together with the digital data.
- 19. A digital mark certification program for providing a mark for data certification based on a digital mark, comprising:
a step of embedding certification information of a mark creation demander in a demander's mark design to create a visible mark on a display in response to demander's request; and a step of distributing a decoding key for decoding of the mark and the visible mark to a demander's terminal device.
- 20. A program running on a terminal device for attaching a mark for data certification based on a digital mark to digital data, comprising:
a step of transmitting a mark creation request to a digital mark certification system, receiving from the system a mark obtained by encrypting information including demander's feature with use of a cryptograph key and embedding the certification information in demander's mark design, and for storing the mark therein; a step of receiving and storing a decoding key for decoding of the mark; and a step of encrypting log information on the digital data with use of the cryptograph key, embedding the encrypted log information in the mark, and transmitting the mark together with the digital data.
Priority Claims (2)
Number |
Date |
Country |
Kind |
10-309806 |
Oct 1998 |
JP |
|
10-244721 |
Aug 1998 |
JP |
|
CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] The present application is a continuation of application Ser. No. 09/429,399, filed Oct. 28, 1999 which is a continuation-in-part of patent application Ser. No. 09/386,442, filed by Kawanishi et al, on Aug. 31, 1999 entitled DOCUMENT MANAGEMENT METHOD, DOCUMENT MANAGEMENT APPARATUS, AND RECORDING MEDIUM STORING SAID DOCUMENT MANAGEMENT PROGRAM, the contents of each being incorporated herein by reference. This application relates to patent application Ser. No. 09/090,419 filed by Yoshiura et al, on Jun. 4, 1998 and entitled DIGITAL DATA AUTHENTICATION, now U.S. Pat. No. 6,131,162 the contents of which is incorporated herein by reference.
Continuations (1)
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Number |
Date |
Country |
Parent |
09429399 |
Oct 1999 |
US |
Child |
10137374 |
May 2002 |
US |
Continuation in Parts (1)
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Number |
Date |
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Parent |
09386442 |
Aug 1999 |
US |
Child |
09429399 |
Oct 1999 |
US |