(In)Security of an Efficient Fingerprinting Scheme with Symmetric and Commutative Encryption of IWDW 2005

Authors:
Raphael C. Phan;Bok-Min Goi
Affiliations:
Laboratoire de sécurité et de cryptographie (LASEC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland CH-1015;Centre for Cryptography and Information Security (CCIS), Faculty of Engineering, Multimedia University, Cyberjaya, Malaysia 63100
Venue:
IWDW '07 Proceedings of the 6th International Workshop on Digital Watermarking
Year:
2008

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Abstract

We analyze the security of a fingerprinting scheme proposed at IWDW 2005. We show two results, namely that this scheme (1) does not provide seller security : a dishonest buyer can repudiate the fact that he redistributed a content, and (2) does not provide buyer security : a buyer can be framed by a malicious seller.