The advanced access content system's use of digital watermarking

  • Authors:
  • Jeffrey Lotspiech

  • Affiliations:
  • Lotspiech Inc., Henderson, Nevada

  • Venue:
  • Proceedings of the 4th ACM international workshop on Contents protection and security
  • Year:
  • 2006

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Abstract

The Advanced Access Content System (AACS) is the copy protection scheme for the new generation of high-definition DVD movies. Fundamentally,AACS is based on crypto-graphic principles. However, it has found a limited use for digital watermarking: first for playback control, and then, to a lesser extent,for forensics. This paper characterizes the forensic approach, and then describes AACS's "theatrical" and "consumer "watermarks and how they are used.