Issued Patents All Time
Showing 26–50 of 70 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8321664 | Method and apparatus for efficient certificate revocation | Zulfikar Ramzan | 2012-11-27 |
| 8256015 | Method and apparatus for authentication of data streams with adaptively controlled losses | Alejandro Hevia, Ravi Jain, Toshiro Kawahara, Zulfikar Ramzan | 2012-08-28 |
| 8209531 | Revocation of cryptographic digital certificates | Zulfikar Ramzan, Bernhard Bruhn | 2012-06-26 |
| 8156327 | Revocation of cryptographic digital certificates | Zulfikar Ramzan, Bernhard Bruhn | 2012-04-10 |
| 8132006 | Cryptographic authentication and/or establishment of shared cryptographic keys, including, but not limited to, password authenticated key exchange (PAKE) | Zulfikar Ramzan, Philip Mackenzie | 2012-03-06 |
| 8098823 | Multi-key cryptographically generated address | James Kempf | 2012-01-17 |
| 8074073 | Certificate-based encryption and public key infrastructure | — | 2011-12-06 |
| 8065332 | Method and apparatus for communication efficient private information retrieval and oblivious transfer | Zulfikar Ramzan | 2011-11-22 |
| 8024562 | Revocation of cryptographic digital certificates | Zulfikar Ramzan, Bernhard Bruhn | 2011-09-20 |
| 8006086 | Revocation of cryptographic digital certificates | Zulfikar Ramzan, Bernhard Bruhn | 2011-08-23 |
| 7987201 | Method and apparatus for communication efficient private information retrieval and oblivious transfer | Zulfikar Ramzan | 2011-07-26 |
| 7957525 | Encryption and signature schemes using message mappings to reduce the message size | — | 2011-06-07 |
| 7941422 | Method and apparatus for communication efficient private information retrieval and oblivious transfer | Zulfikar Ramzan | 2011-05-10 |
| 7925027 | Secure address proxying using multi-key cryptographically generated addresses | James Kempf | 2011-04-12 |
| 7853016 | Signature schemes using bilinear mappings | — | 2010-12-14 |
| 7840994 | Method and apparatus for efficient certificate revocation | Zulfikar Ramzan | 2010-11-23 |
| 7831998 | Changing states of communication links in computer networks in an authenticated manner | Philip Mackenzie, Zulfikar Ramzan | 2010-11-09 |
| 7818570 | Exclusive set system constructions including, but not limited to, applications to broadcast encryption and certificate revocation | Zulfikar Ramzan, David P. Woodruff | 2010-10-19 |
| 7814326 | Signature schemes using bilinear mappings | — | 2010-10-12 |
| 7814314 | Revocation of cryptographic digital certificates | Zulfikar Ramzan, Bernhard Bruhn | 2010-10-12 |
| 7814320 | Cryptographic authentication, and/or establishment of shared cryptographic keys, using a signing key encrypted with a non-one-time-pad encryption, including (but not limited to) techniques with improved security against malleability attacks | Philip Mackenzie, Zulfikar Ramzan | 2010-10-12 |
| 7796751 | Certificate-based encryption and public key infrastructure | — | 2010-09-14 |
| 7783579 | Method and apparatus for secure and small credits for verifiable service provider metering | Zulfikar Ramzan | 2010-08-24 |
| 7751558 | Certificate-based encryption and public key infrastructure | — | 2010-07-06 |
| 7747857 | Use of modular roots to perform authentication including, but not limited to, authentication of validity of digital certificates | Zulfikar Ramzan, Bernhard Bruhn | 2010-06-29 |