Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4908861 | Data authentication using modification detection codes based on a public one way encryption function | Don Coppersmith, Myrna M. Hyden, Stephen M. Matyas, Carl H. W. Meyer, Jonathan Oseas +2 more | 1990-03-13 |
| 4850017 | Controlled use of cryptographic keys via generating station established control values | Stephen M. Matyas, Carl H. W. Meyer | 1989-07-18 |
| 4755940 | Transaction security system | Christopher J. Holloway, Richard E. Lennon, Stephen M. Matyas, Carl H. W. Meyer, Jonathan Oseas | 1988-07-05 |
| 4747050 | Transaction security system using time variant parameter | Christopher J. Holloway, Richard E. Lennon, Stephen M. Matyas, Carl H. W. Meyer, Jonathan Oseas | 1988-05-24 |