Owner Microsoft Corporation

Inventors Guday, Shai; Moore, Timothy M.; Krantz, Anton W.; Aboba, Bernard D.; Bahl, Pradeep; Abraham, Dalen M.

Agent Davies Collison Cave

Pub. Number AU-B-2009208127

Parent 2003266437

Filing date 11 August 2009

Wipo publication date 3 September 2009

Acceptance publication date 3 March 2011

G06F 21/20 (2006.01) Security arrangements for protecting computers or computer systems against unauthorised activity

G06F 15/00 (2006.01) Digital computers in general

G09C 1/00 (2006.01) Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system

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

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

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

H04L 29/08 (2006.01) Arrangements, apparatus, circuits or systems, not covered by a single one of groups - Transmission control procedure, e.g. data link level control procedure