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

2005-12-27

2005-12-27

Feild, Joseph (Department: 2681)

Telecommunications

Radiotelephone system

Security or fraud prevention

C455S411000, C380S273000, C380S277000, C380S044000

Reexamination Certificate

active

06980795

ABSTRACT:
A wireless network employing 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.

REFERENCES:
patent: 5146498 (1992-09-01), Smith
patent: 5412722 (1995-05-01), Sherly et al.
patent: 5546464 (1996-08-01), Raith et al.
patent: 5574785 (1996-11-01), Ueno et al.
patent: 6215875 (2001-04-01), Nohda
By Mouly & Marie-Bernadeete Pautet, Entitled: The GSM System for Mobile Communications, Verlag Cell & Sys, 1992, pp. 391-395.
3GPP: “3rdGeneration Partnership Project (3GPP) ; Technical Specification Group (TSG) RAN; Working Group 2 (WG2) ; Ciphering procedure on the radio interface” TDOC TSGR2-99845, Online! Aug. 1999, pp. 1-5.
3GPP: “3rdGeneration Partnership Project (3GPP) ; Technical Specification Group (TSG) RAN; Working Group 2 (WG2) ; RRC Protocol Specification” TS25.331 V1.3.1, Online! Sep. 1999.

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