Apparatus and method of using a ciphering key in ahybrid communications network

    公开(公告)号:HK1074959A1

    公开(公告)日:2005-11-25

    申请号:HK05107176

    申请日:2005-08-18

    Applicant: QUALCOMM INC

    Abstract: A method of using a ciphering key in a mobile station (18) from a first base station (12) in a first cellular communications system controlled by a first mobile switching control (10) station to a second base station in a second, different cellular system controlled by a second mobile switching control station is described. The method comprises generating for the mobile station a cipher key for use by the mobile station during communication in the second cellular communications system. The cipher key is generated by the mobile station from a private key assigned to the mobile station for the second cellular communications system and from a random number generated by the second cellular communications system. The cipher key is then communicated to the first mobile system and a private long code is generated for use by the mobile station during communication in the first cellular communications system.

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