Processing copy protection signals

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique

Reexamination Certificate

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Details

C380S201000, C380S203000, C713S502000

Reexamination Certificate

active

07454621

ABSTRACT:
The invention relates to a method and an arrangement for recording an information signal with first copy protection information to a storage medium using recording means, the recording being performed according to first copy rules identified by the first copy protection information. The method comprises the steps of detecting said first copy protection information identifying said first copy rules, recording at least second copy protection information according to said detected first copy rules, said first and at least second copy protection information identifying a legality message to be interpreted by reading means, the at least second copy protection information changing within a predefined time interval after the change in said detected first copy rules according to an interpreting rule.

REFERENCES:
patent: 5450248 (1995-09-01), Van Eijck et al.
patent: 5949885 (1999-09-01), Leighton
patent: 6310956 (2001-10-01), Morito et al.
patent: 6473560 (2002-10-01), Linnartz et al.
patent: 6571220 (2003-05-01), Ogino et al.
patent: 6633723 (2003-10-01), Kuroda et al.
patent: 6740875 (2004-05-01), Ishikawa et al.
patent: 6802011 (2004-10-01), Ogino
patent: 2002/0188567 (2002-12-01), Candelore
patent: 2004/0103293 (2004-05-01), Ryan
patent: 2005/0081042 (2005-04-01), Venkatesan et al.
patent: 0969462 (2000-01-01), None
Maes et al. “Digital Watermarking for DVD Video Copy Protection”. IEEE Signal Processing Magazine. Sep. 2000. pp. 47-57.
Maurice Maes et al; “Digital Watermarking for DVD”, IEEE Signal Processing Magazine, pp. 48-57, 2000.
Cox I. J., et al; “Some General Methods for Tampering With Watermarks”, IGGG Journal on Selected Areas in Communications, IEEE Inc, vol. 16, No. 4, pp. 587-593, XP000765117.

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