Method and apparatus for signaling privacy in personal communica

Details Method and apparatus for signaling privacy in personal communica Method and apparatus for signaling privacy in personal communica

1997-10-03

2000-06-27

Swann, Tod R

Cryptography

Communication system using cryptography

380259, 380260, 380268, 380270, 455410, 455422, H04L 900

Patent

active

060816007

ABSTRACT:
A system and method provides signaling privacy for communications between nodes of a communications network (30). Multiple logical links exist between distinct network nodes (38-40, 42, 50-53) of the communication network (30). Signaling privacy is achieved by a subscriber unit (80) providing encryption/decryption of signaling data messages at the messaging level. The subscriber unit (80) employs a signaling encryptor/decryptor (86) along the signaling path, which enables the signaling data messages to be separately encrypted from data on the traffic channel. The encrypted signaling data can then be sent along a different logical link from the traffic, while maintaining cipher key synchronization between the signaling encryptor/decryptor (86) and a network encryptor/decryptor (78) at a remote end of the logical link which transports the encrypted signaling data.

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