Collusion-resistant fingerprinting scheme based on the CDMA-technique

Naoki Hayashi, Minoru Kuribayashi, Masakatu Morii

Research output: Chapter in Book/Report/Conference proceedingConference contribution

23 Citations (Scopus)


Digital fingerprinting is a scheme to insert user's own ID information into digital contents in order to identify illegal users who distribute unauthorized copy. One of the important problems is a collusion attack such that several users combine their copies of a same content to modify /delete the embedded fingerprint. In this paper, we propose a collusion-resilient fingerprinting scheme based on the CDMA technique. By combining spread spectrum sequence with orthogonal transform, we allocate the combination of spectrum components to users as their fingerprints. At a detector side, a threshold for the detection of colluded users is determined considering the false positive probability. We then estimate the parameters in the scheme for both optimal embedding and detection, and improve the accuracy of the detection of colluders. Experimental results show the effectiveness of proposed scheme.

Original languageEnglish
Title of host publicationAdvances in Information and Computer Security - Second International Workshop on Security, IWSEC 2007, Proceedings
PublisherSpringer Verlag
Number of pages16
ISBN (Print)9783540756507
Publication statusPublished - Jan 1 2007
Externally publishedYes
Event2nd International Workshop on Security, IWSEC 2007 - Nara, Japan
Duration: Oct 29 2007Oct 31 2007

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4752 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other2nd International Workshop on Security, IWSEC 2007

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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