Inventor
TAKASHIMA KATSUYUKI
JP28 patents
⚠️ This page may combine multiple inventors who share the name “TAKASHIMA KATSUYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TAKASHIMA KATSUYUKI
14 patentsUS8290146B2Oct 16, 2012
Ciphertext generating apparatus, cryptographic communication system, and group parameter generating apparatus
TAKASHIMA KATSUYUKI36 citations92
US8938623B2Jan 20, 2015
Cryptographic processing system, key generation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program
TAKASHIMA KATSUYUKI12 citations83
US8913742B2Dec 16, 2014
Cryptographic processing system, key generation device, encryption device, decryption device, signature processing system, signature device, and verification device
TAKASHIMA KATSUYUKI11 citations83
US8458479B2Jun 4, 2013
Verification apparatus
TAKASHIMA KATSUYUKI10 citations83
US8111826B2Feb 7, 2012
Apparatus for generating elliptic curve cryptographic parameter, apparatus for processing elliptic curve cryptograph, program for generating elliptic curve cryptographic parameter, and program for processing elliptic cyptograph
TAKASHIMA KATSUYUKI19 citations83
US8559638B2Oct 15, 2013
Cryptographic processing system
TAKASHIMA KATSUYUKI6 citations72
US9183411B2Nov 10, 2015
Cryptographic processing system, key generation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program utilizing attribute information for generation of a key for decryption or encryption
TAKASHIMA KATSUYUKI3 citations62
US8577030B2Nov 5, 2013
Cryptographic processing system, key generation device, key delegation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program
TAKASHIMA KATSUYUKI3 citations62
US9385867B2Jul 5, 2016
Cryptographic processing system, key generation device, encryption device, decryption device, key delegation device, cryptographic processing method, and cryptographic processing program
TAKASHIMA KATSUYUKI1 citations51
US9203622B2Dec 1, 2015
Cryptographic processing system, cryptographic processing method, cryptograhpic processing program, and key generation device
TAKASHIMA KATSUYUKI0 citations51
US9106408B2Aug 11, 2015
Signature processing system, key generation device, signature device, verification device, signature processing method, and signature processing program
TAKASHIMA KATSUYUKI2 citations51
US9407438B2Aug 2, 2016
Cryptographic system, cryptographic method, and cryptographic program
TAKASHIMA KATSUYUKI0 citations41
US8929542B2Jan 6, 2015
Cryptographic processing system, key generation device, key delegation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program
TAKASHIMA KATSUYUKI0 citations41
US8401179B2Mar 19, 2013
Encryption parameter setting apparatus, key generation apparatus, cryptographic system, program, encryption parameter setting method, and key generation method
TAKASHIMA KATSUYUKI0 citations41
MITSUBISHI ELECTRIC CORP
11 patentsUS9413531B2Aug 9, 2016
Cryptographic system, cryptographic method, cryptographic program, and decryption device
MITSUBISHI ELECTRIC CORP4 citations73
US10516534B2Dec 24, 2019
Cryptographic system and key generation apparatus
MITSUBISHI ELECTRIC CORP2 citations72
US11909873B2Feb 20, 2024
Decryption device, cryptographic system, and decryption method
MITSUBISHI ELECTRIC CORP0 citations60
US11888968B2Jan 30, 2024
Signature device, verification device, signature method, verification method, and computer readable medium
MITSUBISHI ELECTRIC CORP0 citations60
US11533176B2Dec 20, 2022
Decryption device, encryption device, and cryptographic system
MITSUBISHI ELECTRIC CORP1 citations59
US11171778B2Nov 9, 2021
Key sharing device, key sharing method, and computer readable medium
MITSUBISHI ELECTRIC CORP0 citations52
US9755823B2Sep 5, 2017
Cryptographic system, cryptographic method, and computer readable medium
MITSUBISHI ELECTRIC CORP0 citations52
US12388621B2Aug 12, 2025
Cryptographic system, encryption device, decryption device, and key generation device
MITSUBISHI ELECTRIC CORP0 citations51
US9640090B2May 2, 2017
Cryptographic system and computer readable medium
MITSUBISHI ELECTRIC CORP1 citations51
US9979536B2May 22, 2018
Cryptographic system, encryption device, re-encryption key generation device, re-encryption device, and cryptographic program
MITSUBISHI ELECTRIC CORP0 citations41
US9722783B2Aug 1, 2017
Cryptographic system
MITSUBISHI ELECTRIC CORP0 citations41