Means for identification and exchange of encryption keys
US5307411A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1992 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Sep 11, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/66
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a means for identification and exchange of encryption keys between communicating apparatuses for encrypted transmissions. The means comprises a card reader for smart cards connected to the communication apparatus which may be a telecommunication apparatus, e.g. of telephone or facsimile type. The reader can communicate with another reader at a called telecommunication apparatus. For identification and exchange of encryption keys the required calculations are performed by the reader or the smart card using data stored on the smart card in a protected field with limited access. The means enable intercommunication between products of different makes owing to a standard identification procedure and exchange of encryption keys.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.