System for providing encryption and decryption of voice and data transmissions to and from an aircraft
US4903298A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Jul 27, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K1/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A data communication system for an aircraft includes a voice encryption unit that is selectably included in the audio path between a user and a radio. The data communication system is interconnected so that the unencrypted audio path of a user is isolated from other users, thus providing the user with a secure, private communications link within the aircraft, as well as between the aircraft and a ground station. The system includes an audio path from the cockpit to the encryption unit and an audio path from the passenger cabin to the encryption unit, and further includes a control unit in each of the cockpit and the cabin so that control of the encryption unit can be selectably switched between the cockpit and the passenger cabin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.