Operator console with paired modules including means for ciphering and deciphering messages therebetween based on a mutually known, exclusive internal security code
US4870612A · kind A · utility
2Cited by
17References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1987 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Nov 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/86
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An operator console for data communication is divided into two separate units which can be connected electrically together, namely a keyboard (10) having a logical unit (21), with a memory (211) and a ciphering/deciphering circuit (22), and a security module (11). Connected between the input side of the keyboard (10) and the memory (211) is a security circuit which disconnects a conduit (240) to the keyboard memory (211), subsequent to a first transfer of a code from the security module (11), and connects instead a conductor (241) to the memory (211) from the ciphering/deciphering circuit (22).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.