Patent ID: 8230218
Filing Date: 2012-07-24
Classification: H04L,H04W

Abstract:
1. A method in a communication system comprising a switching and management infrastructure, and a mobile station, the method comprising: including in the mobile station a first subscriber module and a second subscriber module; authenticating a subscription of the first subscriber module and the second subscriber module by the switching and management infrastructure; generating a first session key for the transmissions between the switching and management infrastructure and the authenticated first subscriber module, and generating at authentication a random number that becomes accessible to the first subscriber module and the second subscriber module after successful authentication of the first subscriber module and the second subscriber module; using the random number to generate a second session key for transmissions between the first subscriber module and the second subscriber module, the second session key being accessible only to the first subscriber module and the second subscriber module that are successfully authenticated by the switching and management infrastructure.