Secure voice communication system
US6907123B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2000 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Feb 21, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K1/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A secure real time voice communication system 70 is provided that allows for the secure transmission of voice communications between a sending device 72 and a receiving device 78 through the public switch telephone network 76. The device 72 uses an encryption decryption engine 30 which is capable of executing a number of encryption algorithms which are selected using an encryption selection table 80. An encryption key can be calculated from a periodic key value and a public variable key value. Further, the encryption algorithm used can be periodically changed during a voice communication session so that multiple encryption techniques can be used within the same communication session.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.