Cryptographic system for wireless communications

摘要

A wireless communications system (110) with increased privacy transmits an encrypted signal between a base station (112) and a wireless terminal (124). In the forward channel, the base station (112) includes an encryptor with a nonlinear scrambler that creates a key signal that has a nonlinear dependence on a long code mask M. The wireless terminal (124) similarly includes a decryptor with a nonlinear scrambler that creates a key signal that has a nonlinear dependence on the long code mask M.