Inventor · disambiguated record
Kazue Sako
Also filed as: SAKO KAZUE
24 granted patents·3 pending applications·671 citations·filing 1994–2019
96Inventor score
Top patents by PatentIndex Score
27 records- 0187US11763383B2Cryptocurrency system, terminal, server, trading method of cryptocurrency, and programNEC CORP·Filed 2019·Granted Sep 19, 2023·3 cites·19 claims
- 0285US7672460B2Mix-net systemNEC CORP·Filed 2005·Granted Mar 2, 2010·10 cites·6 claims
- 0379US5495532ASecure electronic voting using partially compatible homomorphismsNEC RESEARCH INST INC·Filed 1994·Granted Feb 27, 1996·96 cites·28 claims
- 0478US7117368B2Anonymous participation authority management systemNEC CORP·Filed 2001·Granted Oct 3, 2006·26 cites·22 claims
- 0573US6266421B1Key recovery system and key recovery methodHITACHI LTD·Filed 1998·Granted Jul 24, 2001·91 cites·10 claims
- 0671US8223973B2Mix-net systemFURUKAWA JUN·Filed 2010·Granted Jul 17, 2012·2 cites·4 claims
- 0771US6185308B1Key recovery systemFUJITSU LTD·Filed 1998·Granted Feb 6, 2001·77 cites·35 claims
- 0870US7003541B2Zero-knowledge proving system and methodNEC CORP·Filed 2002·Granted Feb 21, 2006·15 cites·53 claims
- 0967US7694880B2Anonymous electronic voting system and anonymous electronic voting methodNEC CORP·Filed 2005·Granted Apr 13, 2010·4 cites·22 claims
- 1067US6754348B1System and method for determining winnerNEC CORP·Filed 2000·Granted Jun 22, 2004·16 cites·11 claims
- 1164US5963649AMessage authorization system for authorizing message for electronic documentNEC CORP·Filed 1996·Granted Oct 5, 1999·53 cites·14 claims
- 1258US7376833B2Anonymous decryption system, anonymous decryption method, and programNEC CORP·Filed 2002·Granted May 20, 2008·5 cites·71 claims
- 1357US6595855B2Electronic lottery system and its operating method and computer-readable recording medium in which the electronic lottery program code is storedNEC CORP·Filed 1998·Granted Jul 22, 2003·55 cites·21 claims
- 1457US5682430ASecure anonymous message transfer and voting schemeNEC RESEARCH INST INC·Filed 1995·Granted Oct 28, 1997·40 cites·34 claims
- 1556US7080045B1Electronic revenue stamp issuing apparatus and method thereof and recording medium stored control program thereofNEC CORP·Filed 2000·Granted Jul 18, 2006·2 cites·19 claims
- 1656US6092051ASecure receipt-free electronic votingNEC RESEARCH INST INC·Filed 1995·Granted Jul 18, 2000·96 cites·21 claims
- 1753US8583925B2Mix-net systemFURUKAWA JUN·Filed 2012·Granted Nov 12, 2013·0 cites·4 claims
- 1853US8553889B2Mix-net systemFURUKAWA JUN·Filed 2012·Granted Oct 8, 2013·0 cites·4 claims
- 1953US2009089575A1Service Providing System, Outsourcer Apparatus, Service Providing Method, and ProgramYONEZAWA SHOKO·Filed 2006·Application pending·0 cites
- 2046US11212112B2System, data management method, and programNEC CORP·Filed 2017·Granted Dec 28, 2021·0 cites·3 claims
- 2145US12079867B2Electronic transaction system, transaction server, verification server, method of transaction, and programNEC CORP·Filed 2018·Granted Sep 3, 2024·0 cites·19 claims
- 2244US6272225B1Key recovery condition encryption and decryption apparatusesNEC CORP·Filed 1998·Granted Aug 7, 2001·18 cites·26 claims
- 2344US6169803B1Encryption key processing system to be incorporated into data recovery system or key setting system for generating encryption keyNEC CORP·Filed 1998·Granted Jan 2, 2001·41 cites·9 claims
- 2442US10797867B2System and method for electronic biddingISSHIKI TOSHIYUKI·Filed 2006·Granted Oct 6, 2020·0 cites·8 claims
- 2542US2008091941A1Group Signature System, Member Status Judging Device, Group Signature Method And Member Status Judging ProgramNEC CORP·Filed 2005·Application pending·0 cites
- 2641US2009044017A1Signature and verifying method, and signature and verifying deviceNEC CORP·Filed 2005·Application pending·0 cites
- 2738US7181405B1Electronic tender systemNEC CORP·Filed 1999·Granted Feb 20, 2007·21 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →