Issued Patents All Time
Showing 26–50 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7353396 | Physical access control | David Engberg, Phil Libin, Leo Reyzin, Alex Sinelnikov | 2008-04-01 |
| 7337315 | Efficient certificate revocation | — | 2008-02-26 |
| 6766450 | Certificate revocation system | — | 2004-07-20 |
| 6487658 | Efficient certificate revocation | — | 2002-11-26 |
| 6301659 | Tree-based certificate revocation system | — | 2001-10-09 |
| 6292893 | Certificate revocation system | — | 2001-09-18 |
| 6141750 | Simultaneous electronic transactions with subscriber verification | — | 2000-10-31 |
| 6137884 | Simultaneous electronic transactions with visible trusted parties | — | 2000-10-24 |
| 6134326 | Simultaneous electronic transactions | — | 2000-10-17 |
| RE36918 | Fair cryptosystems and methods of use | — | 2000-10-17 |
| 6097811 | Tree-based certificate revocation system | — | 2000-08-01 |
| 6026163 | Distributed split-key cryptosystem and applications | — | 2000-02-15 |
| 5960083 | Certificate revocation system | — | 1999-09-28 |
| 5812670 | Traceable anonymous transactions | — | 1998-09-22 |
| 5793868 | Certificate revocation system | — | 1998-08-11 |
| 5790665 | Anonymous information retrieval system (ARS) | — | 1998-08-04 |
| RE35808 | Fair cryptosystems and methods of use | — | 1998-05-26 |
| 5717759 | Method for certifying public keys in a digital signature scheme | — | 1998-02-10 |
| 5717757 | Certificate issue lists | — | 1998-02-10 |
| 5666416 | Certificate revocation system | — | 1997-09-09 |
| 5666414 | Guaranteed partial key-escrow | — | 1997-09-09 |
| 5666420 | Simultaneous electronic transactions | — | 1997-09-09 |
| 5638447 | Compact digital signatures | — | 1997-06-10 |
| 5629982 | Simultaneous electronic transactions with visible trusted parties | — | 1997-05-13 |
| 5615269 | Ideal electronic negotiations | — | 1997-03-25 |