Proceedings of the International Conference
I W S S I P   2005

22 - 24 September 2005, Chalkida Greece
(from Chapter 1: Invited Addresses and Tutorials on Signals, Coding, Systems and Intelligent Techniques)

 Full Citation and Abstract

0 Title: The hierarchical traceability codes for multimedia fingerprinting
  Author(s): Yu-tzu Lin, Ja-ling Wu
  Address: Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan
Department of Computer Science and Information Engineering/Graduate Institute of Networking and Multimedia, National Taiwan University, Taipei, Taiwan
linyt @, wjl @
  Reference: SSIP-SP1, 2005  pp. 221 - 225
This paper presents a hierarchical designing strategy for constructing traceability codes. Traceability codes enable us to trace traitors of collusion attacks in the fingerprinting scheme. To increase the size of the customer base n and the collusion resilience c, the length of the traceability codes grow abruptly. However, in many fingerprinting applications, e.g. multimedia fingerprinting, large customer bases and collusion resilience are needed. As a result, the long-length fingerprinting codes become impractical because they are too long to be embedded in the content without damaging the transparency. The proposed hierarchical fingerprinting scheme divides the fingerprint-codeword into several hierarchies and encodes each hierarchy by traceability codes with smaller n and c, thus a traceability code with much shorter codeword-length is obtained. The user-management mechanism in broadcast encryption can also benefit from this hierarchical fingerprinting structure.
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