| 6272632 |
System and method for controlling access to a user secret using a key recovery field |
David Carman, Homayoon Tajalli, Stephen T. Walker |
2001-08-07 |
| 5991406 |
System and method for data recovery |
Steven B. Lipner, Carl M. Ellison, Stephen T. Walker |
1999-11-23 |
| 5956403 |
System and method for access field verification |
Steven B. Lipner, Carl M. Ellison, Stephen T. Walker |
1999-09-21 |
| 5745573 |
System and method for controlling access to a user secret |
Steven B. Lipner, Carl M. Ellison, Stephen T. Walker |
1998-04-28 |
| 5640454 |
System and method for access field verification |
Steven B. Lipner, Carl M. Ellison, Stephen T. Walker |
1997-06-17 |
| 5557346 |
System and method for key escrow encryption |
Steven B. Lipner, Carl M. Ellison, Stephen T. Walker |
1996-09-17 |
| 5557765 |
System and method for data recovery |
Steven B. Lipner, Carl M. Ellison, Stephen T. Walker |
1996-09-17 |