Inventor
SATO HISAYOSHI
JP26 patents
⚠️ This page may combine multiple inventors who share the name “SATO HISAYOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
16 patentsUS7110545B2Sep 19, 2006
Method and apparatus for symmetric-key encryption
HITACHI LTD62 citations95
US10489604B2Nov 26, 2019
Searchable encryption processing system and searchable encryption processing method
HITACHI LTD38 citations93
US7200232B2Apr 3, 2007
Method and apparatus for symmetric-key decryption
HITACHI LTD5 citations73
US11475121B2Oct 18, 2022
Confidential information processing system and confidential information processing method
HITACHI LTD2 citations72
US9892211B2Feb 13, 2018
Searchable code processing system and method
HITACHI LTD6 citations72
US7359515B2Apr 15, 2008
Method and apparatus for symmetric-key decryption
HITACHI LTD2 citations62
US9479330B2Oct 25, 2016
Method, information service system and program for information encryption/decryption
HITACHI LTD2 citations56
US12518063B2Jan 6, 2026
Computer system and information processing method
HITACHI LTD0 citations51
US11971998B2Apr 30, 2024
Data comparison device, data comparison system, and data comparison method
HITACHI LTD0 citations51
US11811741B2Nov 7, 2023
Information processing system and information processing method
HITACHI LTD0 citations51
US11295635B2Apr 5, 2022
Data processing system and data processing method
HITACHI LTD0 citations51
US11290277B2Mar 29, 2022
Data processing system
HITACHI LTD0 citations51
US11184163B2Nov 23, 2021
Value comparison server, value comparison encryption system, and value comparison method
HITACHI LTD0 citations51
US11120143B2Sep 14, 2021
Data analysis server, data analysis system, and data analysis method
HITACHI LTD0 citations51
US10733317B2Aug 4, 2020
Searchable encryption processing system
HITACHI LTD0 citations41
US9654472B2May 16, 2017
Storage count verification system
HITACHI LTD0 citations41