IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Online ISSN : 1745-1337
Print ISSN : 0916-8508
Special Section on Cryptography and Information Security
An Efficient 2-Secure and Short Random Fingerprint Code and Its Security Evaluation
Koji NUIDASatoshi FUJITSUManabu HAGIWARAHideki IMAITakashi KITAGAWAKazuto OGAWAHajime WATANABE
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2009 Volume E92.A Issue 1 Pages 197-206

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Abstract

The code length of Tardos's collusion-secure fingerprint code is of theoretically minimal order with respect to the number of adversarial users (pirates). However, the constant factor should be further reduced for practical implementation. In this article, we improve the tracing algorithm of Tardos's code and propose a 2-secure and short random fingerprint code, which is secure against collusion attacks by two pirates. Our code length is significantly shorter than that of Tardos's code and its tracing error probability is practically small.

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© 2009 The Institute of Electronics, Information and Communication Engineers
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