Cryptographic system for wireless communications

Cryptography – Key management – Having particular key generator

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380 6, 380 9, 380 43, 380 50, 375200, H04L 900, H04B 169

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active

057270643

ABSTRACT:
A wireless communications system (110) with increased privacy. The system (110) transmits an encrypted signal between a base station (112) and a wireless terminal (122). In the forward channel, the base station (112) includes an encryptor (130) with a nonlinear scrambler (202) that creates an key signal that has a nonlinear dependence on a long code mask M. The wireless terminal (122) similarly includes a decryptor (164) with a nonlinear scrambler (210) that creates a key signal that has a nonlinear dependence on the long code mask M.

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