Owner Siemens Aktiengesellschaft

Inventors McCann, Stephen; Hancock, Robert; Hepworth, Eleanor

Agent Shelston IP

Pub. Number AU-B-2004224971

Priority 0405489.6 12.03.04 GB; 0325980.1 07.11.03 GB

Filing date 29 October 2004

Wipo publication date 26 May 2005

Acceptance publication date 13 November 2008

H04L 9/32 (2006.01) Arrangements for secret or secure communication - including means for verifying the identity or authority of a user of the system

H04B 7/204 (2006.01) Radio transmission systems, i.e. using radiation field - Multiple access

H04K 1/00 (2006.01) Secret communication

H04L 9/00 (2006.01) Arrangements for secret or secure communication

H04L 12/22 (2006.01) Data switching networks - Arrangements for preventing the taking of data from a data transmission channel without authorisation

H04L 12/28 (2006.01) Data switching networks - characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]

H04L 29/06 (2006.01) Arrangements, apparatus, circuits or systems, not covered by a single one of groups - characterised by a protocol

H04Q 7/20 (2006.01)

H04Q 7/38 (2006.01)