Inventor · disambiguated record
Tetsuya Izu
Also filed as: IZU TETSUYA
28 granted patents·18 pending applications·344 citations·filing 2002–2025
95Inventor score
Top patents by PatentIndex Score
46 records- 0198US9203800B2Communication method, node, and network systemFUJITSU LTD·Filed 2013·Granted Dec 1, 2015·222 cites·9 claims
- 0289US7900050B2Digital document management system, digital document management method, and digital document management programFUJITSU LTD·Filed 2006·Granted Mar 1, 2011·16 cites·19 claims
- 0386US8732454B2Key setting method, node, and network systemFUJITSU LTD·Filed 2013·Granted May 20, 2014·9 cites·7 claims
- 0486US8533483B2Data processing apparatus and digital signature methodIZU TETSUYA·Filed 2010·Granted Sep 10, 2013·11 cites·9 claims
- 0585US8719563B2Key setting method, node, and network systemFUJITSU LTD·Filed 2013·Granted May 6, 2014·8 cites·12 claims
- 0685US7639808B2Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem method, elliptic curve cryptosystem program and computer readable recording medium storing the elliptic curve cryptosystem programFUJITSU LTD·Filed 2005·Granted Dec 29, 2009·14 cites·19 claims
- 0785US7536011B2Tamper-proof elliptic encryption with private keyFUJITSU LTD·Filed 2005·Granted May 19, 2009·15 cites·22 claims
- 0879US8037312B2Method and apparatus for digital signature authentication, and computer productFUJITSU LTD·Filed 2007·Granted Oct 11, 2011·8 cites·8 claims
- 0978US9386017B2Authentication device, system and methodFUJITSU LTD·Filed 2014·Granted Jul 5, 2016·5 cites·5 claims
- 1071US7505587B2Elliptic curve cryptosystem apparatus, storage medium storing elliptic curve cryptosystem program, and elliptic curve cryptosystem arithmetic methodFUJITSU LTD·Filed 2002·Granted Mar 17, 2009·14 cites·12 claims
- 1170US9319923B2Node, communication method, and communication systemFUJITSU LTD·Filed 2014·Granted Apr 19, 2016·2 cites·17 claims
- 1270US9032203B2Key setting method, node, server, and network systemFUJITSU LTD·Filed 2013·Granted May 12, 2015·2 cites·18 claims
- 1370US8433910B2Electronic signature method, apparatus, and recording medium having electronic signature program recorded thereonTAKENAKA MASAHIKO·Filed 2009·Granted Apr 30, 2013·4 cites·14 claims
- 1468US8391477B2Cryptographic device having tamper resistance to power analysis attackIZU TETSUYA·Filed 2007·Granted Mar 5, 2013·4 cites·9 claims
- 1566US8312266B2Methods and apparatus for verifying electronic mailYOSHIOKA TAKASHI·Filed 2008·Granted Nov 13, 2012·3 cites·13 claims
- 1665US2025348645A1Quantum circuit design support method and quantum circuit design support apparatusFUJITSU LTD·Filed 2025·Application pending·0 cites
- 1762US9510216B2Node device and communication control methodFUJITSU LTD·Filed 2014·Granted Nov 29, 2016·1 cites·11 claims
- 1862US9071420B2Information processing apparatus, tampering detection apparatus, information processing method, tampering detection method, and computer productFUJITSU LTD·Filed 2013·Granted Jun 30, 2015·1 cites·19 claims
- 1962US8433913B2Apparatus, method, and program for digital signatureTAKENAKA MASAHIKO·Filed 2009·Granted Apr 30, 2013·2 cites·15 claims
- 2061US9614822B2Node device, communication method and network systemFUJITSU LTD·Filed 2015·Granted Apr 4, 2017·1 cites·15 claims
- 2161US8719578B2Document verifying apparatus, document verifying method, and computer productIZU TETSUYA·Filed 2009·Granted May 6, 2014·2 cites·11 claims
- 2257US2007168671A1Digital document management system, digital document management method, and digital document management programFUJITSU LTD·Filed 2006·Application pending·0 cites
- 2355US7970131B2Elliptic curve cryptosystem apparatus, storage medium storing elliptic curve cryptosystem program, and elliptic curve cryptosystem arithmetic methodFUJITSU LTD·Filed 2009·Granted Jun 28, 2011·0 cites·3 claims
- 2455US2025322283A1Computer-readable recording medium storing information processing program, information processing method, and information processing systemFUJITSU LTD·Filed 2025·Application pending·0 cites
- 2551US9489501B2Authentication method, authentication device, and systemFUJITSU LTD·Filed 2014·Granted Nov 8, 2016·0 cites·15 claims
- 2649US8335922B2Recording medium, digital information verification apparatus, and digital information verification methodYOSHIOKA TAKASHI·Filed 2007·Granted Dec 18, 2012·0 cites·20 claims
- 2749US2009210715A1Document verification apparatus, document verification method, and computer productFUJITSU LTD·Filed 2009·Application pending·0 cites
- 2848US9772819B2Apparatus and method for generating physical random numbersFUJITSU LTD·Filed 2014·Granted Sep 26, 2017·0 cites·8 claims
- 2948US9760717B2Communication device, system, and control methodFUJITSU LTD·Filed 2014·Granted Sep 12, 2017·0 cites·4 claims
- 3048US2009290189A1Electronic document managing apparatusFUJITSU LTD·Filed 2009·Application pending·0 cites
- 3147US2010005306A1Storage media storing electronic document management program, electronic document management apparatus, and method to manage electronic documentFUJITSU LTD·Filed 2008·Application pending·0 cites
- 3245US2014334383A1Network system, node device, and method of controlling network systemFUJITSU LTD·Filed 2014·Application pending·0 cites
- 3345US2015188704A1Data communication method and data communication apparatusFUJITSU LTD·Filed 2014·Application pending·0 cites
- 3445US2014348000A1Network system, method of controlling network system, and node deviceFUJITSU LTD·Filed 2014·Application pending·0 cites
- 3543US2022222042A1Computer-readable recording medium storing information processing program, information processing method, and information processing deviceFUJITSU LTD·Filed 2021·Application pending·0 cites
- 3643US2007177721A1Tamper-proof elliptic encryption with private keyFUJITSU LTD·Filed 2005·Application pending·0 cites
- 3740US11451403B2Verification method, information processing device, and non-transitory computer-readable storage medium for storing verification programFUJITSU LTD·Filed 2020·Granted Sep 20, 2022·0 cites·11 claims
- 3840US2011078458A1Contents processing device and contents partial integrity assurance methodFUJITSU LTD·Filed 2010·Application pending·0 cites
- 3940US2010232601A1Elliptic curve arithmetic processing unit and elliptic curve arithmetic processing program and methodFUJITSU LTD·Filed 2010·Application pending·0 cites
- 4039US2013070925A1Communication device, recording medium, and method thereofYAMADA KENJI·Filed 2012·Application pending·0 cites
- 4139US2011194693A1Cryptographic processing apparatus and methodFUJITSU LTD·Filed 2011·Application pending·0 cites
- 4238US9712499B2Method and apparatus for cryptographic processingFUJITSU LTD·Filed 2015·Granted Jul 18, 2017·0 cites·7 claims
- 4338US8452973B2Digital signature method, program, and apparatusIZU TETSUYA·Filed 2010·Granted May 28, 2013·0 cites·18 claims
- 4435US2015163053A1Relay apparatus, method, and systemFUJITSU LTD·Filed 2015·Application pending·0 cites
- 4535US2015281187A1Key transmitting method and key transmitting systemFUJITSU LTD·Filed 2015·Application pending·0 cites
- 4634US2015134963A1Node device and communication methodFUJITSU LTD·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →