Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4908861 | Data authentication using modification detection codes based on a public one way encryption function | Bruno O. Brachtl, Don Coppersmith, Myrna M. Hyden, Stephen M. Matyas, Carl H. W. Meyer +2 more | 1990-03-13 |
| 4757534 | Code protection using cryptography | Stephen M. Matyas | 1988-07-12 |
| 4755940 | Transaction security system | Bruno O. Brachtl, Christopher J. Holloway, Richard E. Lennon, Stephen M. Matyas, Carl H. W. Meyer | 1988-07-05 |
| 4747050 | Transaction security system using time variant parameter | Bruno O. Brachtl, Christopher J. Holloway, Richard E. Lennon, Stephen M. Matyas, Carl H. W. Meyer | 1988-05-24 |
| 4649233 | Method for establishing user authenication with composite session keys among cryptographically communicating nodes | Walter E. Bass, Stephen M. Matyas | 1987-03-10 |
| 4227253 | Cryptographic communication security for multiple domain networks | William F. Ehrsam, Robert C. Elander, Lloyd L. Hollis, Richard E. Lennon, Stephen M. Matyas +2 more | 1980-10-07 |
| 4193131 | Cryptographic verification of operational keys used in communication networks | Richard E. Lennon, Stephen M. Matyas, Carl H. W. Meyer, Paul N. Prentice, Walter L. Tuchman | 1980-03-11 |