Method of controlling a network entity and a mobile station

Details Method of controlling a network entity and a mobile station Method of controlling a network entity and a mobile station

2007-10-16

2007-10-16

Appiah, Charles N. (Department: 2617)

Telecommunications

Radiotelephone system

Security or fraud prevention

C455S415000, C380S044000, C380S201000, C380S247000

Reexamination Certificate

active

10516715

ABSTRACT:
A network entity and the mobile station are adapted to conduct a plurality of predetermined message exchange procedures, including encryption key generation procedures. The method comprises determining whether a received message from a mobile station is encrypted. If the received message is encrypted, it is determined whether a correct encryption key for decrypting said message is available to said network entity and, if no correct key is available, a predetermined triggering message is sent to the mobile station. The mobile station then interrupts the procedure exchange procedure and initiates an encryption key generation procedure.

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