Inventor · disambiguated record
Charles W. Kaufman
Also filed as: KAUFMAN CHARLES · KAUFMAN CHARLES W · KAUFMAN CHARLES WILLIAM · KAUFMAN JR CHARLES WILLIAM
77 granted patents·10 pending applications·5,458 citations·filing 1988–2024
99Inventor score
Top patents by PatentIndex Score
87 records- 0198US5224163AMethod for delegating authorization from one entity to another through the use of session encryption keysDIGITAL EQUIPMENT CORP·Filed 1990·Granted Jun 29, 1993·513 cites·15 claims
- 0296US10756904B1Efficient and secure distributed ledger maintenanceEMC IP HOLDING CO LLC·Filed 2018·Granted Aug 25, 2020·24 cites·20 claims
- 0395US10205594B1Crypto-erasure resilient to network outageEMC CORP·Filed 2016·Granted Feb 12, 2019·15 cites·9 claims
- 0495US5666415AMethod and apparatus for cryptographic authenticationDIGITAL EQUIPMENT CORP·Filed 1995·Granted Sep 9, 1997·481 cites·20 claims
- 0595US5497421AMethod and apparatus for protecting the confidentiality of passwords in a distributed data processing systemDIGITAL EQUIPMENT CORP·Filed 1994·Granted Mar 5, 1996·254 cites·7 claims
- 0695US5491752ASystem for increasing the difficulty of password guessing attacks in a distributed authentication scheme employing authentication tokensDIGITAL EQUIPMENT CORP PATENT·Filed 1994·Granted Feb 13, 1996·419 cites·37 claims
- 0795US5220604AMethod for performing group exclusion in hierarchical group structuresDIGITAL EQUIPMENT CORP·Filed 1990·Granted Jun 15, 1993·310 cites·3 claims
- 0894US10298551B1Privacy-preserving policy enforcement for messagingEMC IP HOLDING CO LLC·Filed 2016·Granted May 21, 2019·14 cites·20 claims
- 0994US9467473B2System and method for compact form exhaustive analysis of security policiesMICROSOFT CORP·Filed 2013·Granted Oct 11, 2016·34 cites·17 claims
- 1094US5418854AMethod and apparatus for protecting the confidentiality of passwords in a distributed data processing systemDIGITAL EQUIPMENT CORP·Filed 1992·Granted May 23, 1995·235 cites·13 claims
- 1194US5081678AMethod for utilizing an encrypted key as a key identifier in a data packet in a computer networkDIGITAL EQUIPMENT CORP·Filed 1989·Granted Jan 14, 1992·174 cites·22 claims
- 1293US5261002AMethod of issuance and revocation of certificates of authenticity used in public key networks and other systemsDIGITAL EQUIPMENT CORP·Filed 1992·Granted Nov 9, 1993·242 cites·18 claims
- 1392US6061799ARemovable media for password based authentication in a distributed systemIBM·Filed 1997·Granted May 9, 2000·276 cites·21 claims
- 1492US5787169AMethod and apparatus for controlling access to encrypted data files in a computer systemIBM·Filed 1995·Granted Jul 28, 1998·196 cites·28 claims
- 1592US5500860ARouter using multiple hop redirect messages to enable bridge like data forwardingDIGITAL EQUIPMENT CORP·Filed 1991·Granted Mar 19, 1996·184 cites·6 claims
- 1691US11019033B1Trust domain secure enclaves in cloud infrastructureEMC IP HOLDING CO LLC·Filed 2019·Granted May 25, 2021·9 cites·20 claims
- 1791US8082442B2Securely sharing applications installed by unprivileged usersKELJO JONATHAN·Filed 2006·Granted Dec 20, 2011·51 cites·11 claims
- 1890US10394646B1Incremental data validationEMC IP HOLDING CO LLC·Filed 2015·Granted Aug 27, 2019·8 cites·18 claims
- 1990US6178508B1System for controlling access to encrypted data files by a plurality of usersIBM·Filed 1998·Granted Jan 23, 2001·137 cites·16 claims
- 2088US11128460B2Client-side encryption supporting deduplication across single or multiple tenants in a storage systemEMC IP HOLDING CO LLC·Filed 2018·Granted Sep 21, 2021·6 cites·20 claims
- 2186US5796830AInteroperable cryptographic key recovery systemIBM·Filed 1996·Granted Aug 18, 1998·139 cites·32 claims
- 2286US5664099AMethod and apparatus for establishing a protected channel between a user and a computer systemLOTUS DEV CORP·Filed 1995·Granted Sep 2, 1997·129 cites·21 claims
- 2385US7360082B1System and method for downloading security context elements governing execution of downloadable and distributable agentsIBM·Filed 2000·Granted Apr 15, 2008·58 cites·14 claims
- 2485US6094721AMethod and apparatus for password based authentication in a distributed systemIBM·Filed 1997·Granted Jul 25, 2000·128 cites·26 claims
- 2584US6052469AInteroperable cryptographic key recovery system with verification by comparisonIBM·Filed 1998·Granted Apr 18, 2000·125 cites·20 claims
- 2684US5483598AMessage encryption using a hash functionDIGITAL EQUIPMENT CORP PATENT·Filed 1993·Granted Jan 9, 1996·119 cites·7 claims
- 2783US5574860AMethod of neighbor discovery over a multiaccess nonbroadcast mediumDIGITAL EQUIPMENT CORP·Filed 1993·Granted Nov 12, 1996·117 cites·14 claims
- 2883US5018137ATransparent load sharing for parallel networksDIGITAL EQUIPMENT CORP·Filed 1990·Granted May 21, 1991·122 cites·13 claims
- 2982US5764772ADifferential work factor cryptography method and systemLOTUS DEV COPORATION·Filed 1995·Granted Jun 9, 1998·151 cites·21 claims
- 3080US5128926AUpdating link state information in networksDIGITAL EQUIPMENT CORP·Filed 1990·Granted Jul 7, 1992·96 cites·34 claims
- 3178US11374769B2Efficient and secure distributed ledger maintenanceEMC IP HOLDING CO LLC·Filed 2020·Granted Jun 28, 2022·1 cites·20 claims
- 3278US5086469AEncryption with selective disclosure of protocol identifiersDIGITAL EQUIPMENT CORP·Filed 1990·Granted Feb 4, 1992·88 cites·6 claims
- 3377US5070528AGeneric encryption technique for communication networksDIGITAL EQUIPMENT CORP·Filed 1990·Granted Dec 3, 1991·86 cites·16 claims
- 3475US6687825B1Data processing system and method for protecting data in a hard drive utilizing a signature deviceIBM·Filed 2000·Granted Feb 3, 2004·22 cites·17 claims
- 3575US5815573ACryptographic key recovery systemIBM·Filed 1996·Granted Sep 29, 1998·89 cites·27 claims
- 3674US11290276B2Method and system for a signed document validity serviceEMC IP HOLDING CO LLC·Filed 2019·Granted Mar 29, 2022·2 cites·20 claims
- 3773US7949880B2Secure remote password validationIBM·Filed 2010·Granted May 24, 2011·4 cites·9 claims
- 3873US7900248B2Access control negation using negative groupsMICROSOFT CORP·Filed 2007·Granted Mar 1, 2011·7 cites·20 claims
- 3972US11550919B2Prioritizing patching of vulnerable componentsEMC IP HOLDING CO LLC·Filed 2020·Granted Jan 10, 2023·1 cites·20 claims
- 4072US5796740ARouter using multiple hop redirect messages to enable bridge like data forwardingCABLETRON SYSTEMS INC·Filed 1997·Granted Aug 18, 1998·69 cites·23 claims
- 4172US5235644AProbabilistic cryptographic processing methodDIGITAL EQUIPMENT CORP·Filed 1990·Granted Aug 10, 1993·65 cites·20 claims
- 4271US10680813B2Crypto-erasure resilient to network outageEMC IP HOLDING CO LLC·Filed 2019·Granted Jun 9, 2020·1 cites·5 claims
- 4371US8402532B2Host control of partial trust accessibilityDOWNEN MICHAEL D·Filed 2007·Granted Mar 19, 2013·8 cites·20 claims
- 4471US7603712B2Protecting a computer that provides a Web service from malwareMICROSOFT CORP·Filed 2005·Granted Oct 13, 2009·5 cites·20 claims
- 4571US7480718B2Method for providing single sign-on user names for Web cookies in a multiple user information directory environmentIBM·Filed 2004·Granted Jan 20, 2009·14 cites·4 claims
- 4670US9253195B2Transformation of sequential access control lists utilizing certificatesMICROSOFT TECHNOLOGY LICENSING LLC·Filed 2013·Granted Feb 2, 2016·2 cites·20 claims
- 4770US5351295ASecure method of neighbor discovery over a multiaccess mediumDIGITAL EQUIPMENT CORP·Filed 1993·Granted Sep 27, 1994·55 cites·6 claims
- 4867US8468579B2Transformation of sequential access control lists utilizing certificatesELLISON CARL MELVIN·Filed 2007·Granted Jun 18, 2013·3 cites·20 claims
- 4966US8291088B2Method and system for providing single sign-on user names for web cookies in a multiple user information directory environmentMARCUS JANE B·Filed 2008·Granted Oct 16, 2012·3 cites·15 claims
- 5063US8839375B2Managing distributed operating system physical resourcesRADZIKOWSKI ERIC·Filed 2012·Granted Sep 16, 2014·3 cites·20 claims
Showing the top 50 of 87 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →