Encrypton system for digital cellular communications
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United States of America Patent
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Sep 15, 1992
Issued Date -
N/A
app pub date -
May 31, 1991
filing date -
Jul 20, 1990
priority date (Note) -
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Abstract
A system for generating a pseudo-random bit sequence which may be used in enciphering digital data prior to transmission or storage of the data. The bit sequence is generated by expanding a plurality of secret key bits in a manner suitable for implementation with a conventional microprocessor arithmetic logic unit (ALU). The system of the present invention may be used, for example, to secure voice or data communications between a base station and a mobile station in a digital cellular communications system.
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