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...http://www.google.de/patents/US7602917?utm_source=gb-gplus-sharePatent US7602917 - Method of ciphering data transmission in a radio system
