Short Collusion-Secure Fingerprint Codes against Three Pirates

In this article, we propose a new construction of probabilistic collusion-secure fingerprint codes against up to three pirates and give a theoretical security evaluation. Our pirate tracing algorithm combines a scoring method analogous to Tardos codes (J. ACM, 2008) with an extension of parent search techniques of some preceding 2-secure codes. Numerical examples show that our code lengths are significantly shorter than (about 30% to 40% of) the shortest known c-secure codes by Nuida et al. (Des. Codes Cryptogr., 2009) with c = 3. Some preliminary proposal for improving efficiency of our tracing algorithm is also given.

• Type: Journal
• Year: 2010
• Where: IH
• Authors: Koji Nuida
• Keywords: Collusion-secure Fingerprint Codes, IH 2010, Information Technology, Parent Search Techniques, Theoretical Security Evaluation