Owner Sony Corporation

Inventors Hosoi, Takafumi; Tanaka, Masao; Abe, Miki; Matsuda, Hiromi

Agent Spruson & Ferguson

Pub. Number AU-B-2002313214

PCT Number PCT/JP02/05908

PCT Pub. Number WO2002/103529

Priority 2001-178512 13.06.01 JP

Filing date 13 June 2002

Wipo publication date 2 January 2003

Acceptance publication date 20 December 2007

G06F 12/14 (2006.01) Accessing, addressing or allocating within memory systems or architectures - Protection against unauthorised use of memory

G06F 12/00 (2006.01) Accessing, addressing or allocating within memory systems or architectures

G06F 21/00 (2006.01) Security arrangements for protecting computers or computer systems against unauthorised activity

G06F 21/24 (2006.01) Security arrangements for protecting computers or computer systems against unauthorised activity

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

G11B 20/00 (2006.01) Signal processing not specific to the method of recording or reproducing

G11B 27/034 (2006.01) Editing

G11B 27/10 (2006.01) Editing - Indexing

H04L 9/08 (2006.01) Arrangements for secret or secure communication - Key distribution

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

H04N 7/173 (2006.01) Television systems - with two-way working, e.g. subscriber sending a programme selection signal

G11B 20/10 (2006.01) Signal processing not specific to the method of recording or reproducing - Digital recording or reproducing

G11B 20/12 (2006.01) Signal processing not specific to the method of recording or reproducing - Formatting, e.g. arrangement of data block or words on the record carriers