Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5224163 | Method for delegating authorization from one entity to another through the use of session encryption keys | Andrew C. Goldstein, Charles W. Kaufman, Butler W. Lampson | 1993-06-29 |
| 5220604 | Method for performing group exclusion in hierarchical group structures | Andrew C. Goldstein, Charles W. Kaufman | 1993-06-15 |
| 5210795 | Secure user authentication from personal computer | Steven B. Lipner, Butler W. Lampson | 1993-05-11 |