Method of ciphering data transmission in a radio system

Details Method of ciphering data transmission in a radio system Method of ciphering data transmission in a radio system

2004-12-15

2009-10-13

Tran, Ellen (Department: 2433)

Cryptography

Communication system using cryptography

Wireless communication

C380S272000, C380S034000

Reexamination Certificate

active

07602917

ABSTRACT:
The invention relates to a method of ciphering data transmission in a radio system, and to a user equipment using the method, and to a radio network subsystem using the method. The method includes the steps of: (602) generating a ciphering key; (604A) producing a ciphering mask in a ciphering algorithm using the ciphering key as an input parameter; (604B) using a logical channel specific parameter or a transport channel specific parameter as an additional input parameter to the ciphering algorithm; and (606) producing ciphered data by applying the ciphering mask to plain data.

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