Katsuyuki Takashima

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Decryption device, cryptographic system, and decryption method
- Patent number 11,909,873
- Issue date Feb 20, 2024
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Signature device, verification device, signature method, verificati...
- Patent number 11,888,968
- Issue date Jan 30, 2024
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Decryption device, encryption device, and cryptographic system
- Patent number 11,533,176
- Issue date Dec 20, 2022
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key sharing device, key sharing method, and computer readable medium
- Patent number 11,171,778
- Issue date Nov 9, 2021
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Cryptographic system and key generation apparatus
- Patent number 10,516,534
- Issue date Dec 24, 2019
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic system, encryption device, re-encryption key generati...
- Patent number 9,979,536
- Issue date May 22, 2018
- Mitsubishi Electric Corporation
- Yutaka Kawai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic system, cryptographic method, and computer readable m...
- Patent number 9,755,823
- Issue date Sep 5, 2017
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic system
- Patent number 9,722,783
- Issue date Aug 1, 2017
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic system and computer readable medium
- Patent number 9,640,090
- Issue date May 2, 2017
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic system, cryptographic method, cryptographic program,...
- Patent number 9,413,531
- Issue date Aug 9, 2016
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic system, cryptographic method, and cryptographic program
- Patent number 9,407,438
- Issue date Aug 2, 2016
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic processing system, key generation device, encryption...
- Patent number 9,385,867
- Issue date Jul 5, 2016
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic system, re-encryption key generation device, re-encry...
- Patent number 9,344,276
- Issue date May 17, 2016
- Mitsubishi Electric Corporation
- Yutaka Kawai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Encrypted data management device, encrypted data management method,...
- Patent number 9,237,013
- Issue date Jan 12, 2016
- Mitsubishi Electric Corporation
- Sachihiro Ichikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic processing system, cryptographic processing method, c...
- Patent number 9,203,622
- Issue date Dec 1, 2015
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic processing system, key generation device, encryption...
- Patent number 9,183,411
- Issue date Nov 10, 2015
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signature processing system, key generation device, signature devic...
- Patent number 9,106,408
- Issue date Aug 11, 2015
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data processing device
- Patent number 8,958,552
- Issue date Feb 17, 2015
- Mitsubishi Electric Corporation
- Mitsuhiro Hattori
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic processing system, key generation device, encryption...
- Patent number 8,938,623
- Issue date Jan 20, 2015
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic processing system, key generation device, key delegat...
- Patent number 8,929,542
- Issue date Jan 6, 2015
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic processing system, key generation device, encryption...
- Patent number 8,913,742
- Issue date Dec 16, 2014
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic processing system, key generation device, key delegat...
- Patent number 8,577,030
- Issue date Nov 5, 2013
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cryptographic processing system
- Patent number 8,559,638
- Issue date Oct 15, 2013
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Verification apparatus
- Patent number 8,458,479
- Issue date Jun 4, 2013
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Encryption parameter setting apparatus, key generation apparatus, c...
- Patent number 8,401,179
- Issue date Mar 19, 2013
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ciphertext generating apparatus, cryptographic communication system...
- Patent number 8,290,146
- Issue date Oct 16, 2012
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for generating elliptic curve cryptographic parameter, ap...
- Patent number 8,111,826
- Issue date Feb 7, 2012
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
CRYPTOGRAPHIC SYSTEM, ENCRYPTION DEVICE, DECRYPTION DEVICE, AND KEY...
- Publication number 20230179397
- Publication date Jun 8, 2023
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SIGNATURE DEVICE, VERIFICATION DEVICE, SIGNATURE METHOD, VERIFICATI...
- Publication number 20210359848
- Publication date Nov 18, 2021
- Mitsubishi Electric Corporation
- Katsuyuki TAKASHIMA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DECRYPTION DEVICE, CRYPTOGRAPHIC SYSTEM, AND DECRYPTION METHOD
- Publication number 20210234676
- Publication date Jul 29, 2021
- Mitsubishi Electric Corporation
- Katsuyuki TAKASHIMA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
KEY SHARING DEVICE, KEY SHARING METHOD, AND COMPUTER READABLE MEDIUM
- Publication number 20210083854
- Publication date Mar 18, 2021
- Mitsubishi Electric Corporation
- Katsuyuki TAKASHIMA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DECRYPTION DEVICE, ENCRYPTION DEVICE, AND CRYPTOGRAPHIC SYSTEM
- Publication number 20210036852
- Publication date Feb 4, 2021
- Mitsubishi Electric Corporation
- Katsuyuki TAKASHIMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ENCRYPTION DEVICE, DECRYPTION DEVICE, ENCRYPTION METHOD, DECRYPTION...
- Publication number 20200175893
- Publication date Jun 4, 2020
- Mitsubishi Electric Corporation
- Katsuyuki TAKASHIMA
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
CRYPTOGRAPHIC SYSTEM AND KEY GENERATION APPARATUS
- Publication number 20180357933
- Publication date Dec 13, 2018
- Mitsubishi Electric Corporation
- Katsuyuki TAKASHIMA
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
CRYPTOGRAPHIC SYSTEM AND COMPUTER READABLE MEDIUM
- Publication number 20170053566
- Publication date Feb 23, 2017
- Mitsubishi Electric Corporation
- Katsuyuki TAKASHIMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC SYSTEM, RE-ENCRYPTION KEY GENERATION DEVICE, RE-ENCRY...
- Publication number 20160344708
- Publication date Nov 24, 2016
- Mitsubishi Electric Corporation
- Yutaka KAWAI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC SYSTEM, KEY GENERATION APPARATUS, RE-ENCRYPTION APPAR...
- Publication number 20160330022
- Publication date Nov 10, 2016
- Mitsubishi Electric Corporation
- Takashi ITO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC SYSTEM, ENCRYPTION DEVICE, RE-ENCRYPTION KEY GENERATI...
- Publication number 20160234012
- Publication date Aug 11, 2016
- Mitsubishi Electric Corporation
- Yutaka KAWAI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC METHOD, AND CRYPTOGRAPHIC PROGRAM
- Publication number 20160072625
- Publication date Mar 10, 2016
- Mitsubishi Electric Corporation
- Katsuyuki TAKASHIMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC SYSTEM, RE-ENCRYPTION KEY GENERATION DEVICE, RE-ENCRY...
- Publication number 20150318988
- Publication date Nov 5, 2015
- Mitsubishi Electric Corporation
- Yutaka KAWAI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC SYSTEM
- Publication number 20150229472
- Publication date Aug 13, 2015
- MITSUBISHI ELECTRIC CORPORAITON
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC METHOD, CRYPTOGRAPHIC PROGRAM,...
- Publication number 20150098566
- Publication date Apr 9, 2015
- MITSUBISHI ELECTRIC CORPORATION
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC METHOD, AND CRYPTOGRAPHIC PROGRAM
- Publication number 20150010147
- Publication date Jan 8, 2015
- MITSUBISHI ELECTRIC CORPORATION
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ENCRYPTED DATA MANAGEMENT DEVICE, ENCRYPTED DATA MANAGEMENT METHOD,...
- Publication number 20140310521
- Publication date Oct 16, 2014
- Mitsubishi Electric Corporation
- Sachihiro Ichikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC PROCESSING SYSTEM, CRYPTOGRAPHIC PROCESSING METHOD, C...
- Publication number 20140298028
- Publication date Oct 2, 2014
- MITSUBISHI ELECTRIC CORPORATION
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, ENCRYPTION...
- Publication number 20130336474
- Publication date Dec 19, 2013
- Nippon Telegraph and Telephone Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, ENCRYPTION...
- Publication number 20130339754
- Publication date Dec 19, 2013
- Nippon Telegraph and Telephone Corporation
- Katsuyuki Takashima
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
SIGNATURE PROCESSING SYSTEM, KEY GENERATION DEVICE, SIGNATURE DEVIC...
- Publication number 20130322627
- Publication date Dec 5, 2013
- NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, ENCRYPTION...
- Publication number 20130173929
- Publication date Jul 4, 2013
- Nippon Telegraph and Telephone Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, KEY DELEGAT...
- Publication number 20130039489
- Publication date Feb 14, 2013
- Nippon Telegraph and Telephone Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, ENCRYPTION...
- Publication number 20130028415
- Publication date Jan 31, 2013
- Nippon Telegraph and Telephone Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SECURE SEARCH SYSTEM, PUBLIC PARAMETER GENERATION DEVICE, ENCRYPTIO...
- Publication number 20120324240
- Publication date Dec 20, 2012
- Mitsubishi Electric Corporation
- Mitsuhiro Hattori
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, KEY DELEGAT...
- Publication number 20120284530
- Publication date Nov 8, 2012
- Nippon Telegraph and Telephone Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DATA PROCESSING DEVICE
- Publication number 20120207299
- Publication date Aug 16, 2012
- Mitsubishi Electric Corporation
- Mitsuhiro Hattori
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CRYPTOGRAPHIC PROCESSING SYSTEM
- Publication number 20120045056
- Publication date Feb 23, 2012
- Nippon Telegraph and Telephone Corp.
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ENCRYPTION PARAMETER SETTING APPARATUS, KEY GENERATION APPARATUS, C...
- Publication number 20100329454
- Publication date Dec 30, 2010
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
VERIFICATION APPARATUS
- Publication number 20100275028
- Publication date Oct 28, 2010
- Mitsubishi Electric Corporation
- Katsuyuki Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Katsuyuki Takashima

Person

Patents Grantslast 30 patents

Decryption device, cryptographic system, and decryption method

Signature device, verification device, signature method, verificati...

Decryption device, encryption device, and cryptographic system

Key sharing device, key sharing method, and computer readable medium

Cryptographic system and key generation apparatus

Cryptographic system, encryption device, re-encryption key generati...

Cryptographic system, cryptographic method, and computer readable m...

Cryptographic system

Cryptographic system and computer readable medium

Cryptographic system, cryptographic method, cryptographic program,...

Cryptographic system, cryptographic method, and cryptographic program

Cryptographic processing system, key generation device, encryption...

Cryptographic system, re-encryption key generation device, re-encry...

Encrypted data management device, encrypted data management method,...

Cryptographic processing system, cryptographic processing method, c...

Cryptographic processing system, key generation device, encryption...

Signature processing system, key generation device, signature devic...

Data processing device

Cryptographic processing system, key generation device, encryption...

Cryptographic processing system, key generation device, key delegat...

Cryptographic processing system, key generation device, encryption...

Cryptographic processing system, key generation device, key delegat...

Cryptographic processing system

Verification apparatus

Encryption parameter setting apparatus, key generation apparatus, c...

Ciphertext generating apparatus, cryptographic communication system...

Apparatus for generating elliptic curve cryptographic parameter, ap...

Patents Applicationslast 30 patents

CRYPTOGRAPHIC SYSTEM, ENCRYPTION DEVICE, DECRYPTION DEVICE, AND KEY...

SIGNATURE DEVICE, VERIFICATION DEVICE, SIGNATURE METHOD, VERIFICATI...

DECRYPTION DEVICE, CRYPTOGRAPHIC SYSTEM, AND DECRYPTION METHOD

KEY SHARING DEVICE, KEY SHARING METHOD, AND COMPUTER READABLE MEDIUM

DECRYPTION DEVICE, ENCRYPTION DEVICE, AND CRYPTOGRAPHIC SYSTEM

ENCRYPTION DEVICE, DECRYPTION DEVICE, ENCRYPTION METHOD, DECRYPTION...

CRYPTOGRAPHIC SYSTEM AND KEY GENERATION APPARATUS

CRYPTOGRAPHIC SYSTEM AND COMPUTER READABLE MEDIUM

CRYPTOGRAPHIC SYSTEM, RE-ENCRYPTION KEY GENERATION DEVICE, RE-ENCRY...

CRYPTOGRAPHIC SYSTEM, KEY GENERATION APPARATUS, RE-ENCRYPTION APPAR...

CRYPTOGRAPHIC SYSTEM, ENCRYPTION DEVICE, RE-ENCRYPTION KEY GENERATI...

CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC METHOD, AND CRYPTOGRAPHIC PROGRAM

CRYPTOGRAPHIC SYSTEM, RE-ENCRYPTION KEY GENERATION DEVICE, RE-ENCRY...

CRYPTOGRAPHIC SYSTEM

CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC METHOD, CRYPTOGRAPHIC PROGRAM,...

CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC METHOD, AND CRYPTOGRAPHIC PROGRAM

ENCRYPTED DATA MANAGEMENT DEVICE, ENCRYPTED DATA MANAGEMENT METHOD,...

CRYPTOGRAPHIC PROCESSING SYSTEM, CRYPTOGRAPHIC PROCESSING METHOD, C...

CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, ENCRYPTION...

CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, ENCRYPTION...

SIGNATURE PROCESSING SYSTEM, KEY GENERATION DEVICE, SIGNATURE DEVIC...

CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, ENCRYPTION...

CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, KEY DELEGAT...

CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, ENCRYPTION...

SECURE SEARCH SYSTEM, PUBLIC PARAMETER GENERATION DEVICE, ENCRYPTIO...

CRYPTOGRAPHIC PROCESSING SYSTEM, KEY GENERATION DEVICE, KEY DELEGAT...

DATA PROCESSING DEVICE

CRYPTOGRAPHIC PROCESSING SYSTEM

ENCRYPTION PARAMETER SETTING APPARATUS, KEY GENERATION APPARATUS, C...

VERIFICATION APPARATUS