Providing Voice Privacy Over Public Switched Telephone Networks

: The public telephone network has been evolving from manually switched wires carrying analog encoded voice of the 19th century to an automatically switched grid of copper-wired, fiber optical and radio linked portions carrying digitally encoded voice and other data. Simultaneously, as our security consciousness increases, so does our desire to keep our conversations private. Applied to the traffic traversing the globe on the public telephone network, privacy requires that our telephone companies provide us with a service whereby unintended third parties are unable to access other’s information. However, existing public telephone network infrastructures do not provide such a service. This paper proposes a security architecture that provides end-to-end voice privacy and authentication services within the boundaries of the existing public telephone network infrastructures. Proposed architecture uses public key cryptography for authentication and key distribution, and symmetric key cryp...

• Type: Conference
• Year: 2003
• Where: SEC
• Authors: Mohamed Sharif, Duminda Wijesekera
• Keywords: Public Switched Telephone Network, Public Telephone Network, SEC 2003, SEC 2007, Telephone Network Infrastructures