Secure communications system
US4171513A · kind A · utility
130Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1969 |
| Grant date | Oct 16, 1979 |
| Priority date | — |
| Expiry date | Jul 22, 1989 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K1/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A privacy communication system is herein disclosed comprising apparatus for digitizing information to be transmitted, apparatus for logically adding a selected pseudo-random digital code to the digitized information, apparatus for removing the pseudo-random code upon reception and apparatus for synchronizing the transmitted and received pseudo-random codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.