Short 3-Secure Fingerprinting Codes for Copyright Protection

Abstract

A construction is presented to obtain 3-secure fingerprinting codes for copyright protection. Resistance against collusions of up to three buyers is achieved with a codeword length dramatically shorter than the one required by the general Boneh-Shaw construction. Thus the proposed fingerprints require much less embedding capacity. Due to their very clandestine nature, collusions tend to involve a small number of buyers, so that there is plenty of use for codes providing cost-effective protection against collusions of size up to 3.

This work has been partly supported by the European Commission under project IST-2001-32012 “Co-Orthogonal Codes” and by the Spanish Ministry of Science and Technology and the European FEDER fund through project no. TIC2001-0633-C03-01 “STREAMOBILE”.