Wireless network with a cipher key change procedure

Details Wireless network with a cipher key change procedure Wireless network with a cipher key change procedure

2006-10-10

2006-10-10

Feild, Joseph (Department: 2617)

Telecommunications

Radiotelephone system

Security or fraud prevention

C455S411000, C380S247000, C713S171000

Reexamination Certificate

active

07120421

ABSTRACT:
The invention relates to a wireless network comprising a radio network controller and a plurality of assigned terminals which are provided for coding certain data to be transmitted over traffic and control channels and which are provided for changing the respective key necessary for the coding at certain instants. The radio network controller sends a message about a change of the key coded with an old cipher key to a terminal. The terminal responds with a message coded with a new cipher key as an acknowledgement for the new cipher key.

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patent: 5841873 (1998-11-01), Lockhart et al.
patent: 6215875 (2001-04-01), Nohda
patent: 6892940 (2005-05-01), Kocarev et al.
By Mouly & Marie-Bernadeete Pautet, Entitled: The GSM System For Mobile Communicaitons Verlag Cell & Sys, 1992, pp. 391-395.
3GPP: “3rd Generation Partnership Project (3GPP): Technical Specification Group (TSG) Ran; Working Group 2 (WG2); Ciphering Procedure on the Radio . . . ” Aug. 1999, pp. 1-5.
3GPP: “3rd Generation Partnership Project (3GPP); Technical Specification” TS25.331 V1.3.1, Online.

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