Collusion-Resistant Fingerprinting Systems: Review and Recent Results

Abstract

This paper provides a review of previous work and recent results on the design and analysis of collusion-resistant fingerprinting systems. Collusion attacks examined in previous work are with constant weights for all colluders. Collusion attacks on continuous media (such as audio and video) with time-varying weights are simple to implement, but have never been treated by other researchers. In recent years, we have proposed a new fingerprinting system called MC-CDMA-based fingerprinting since it is inspired by the multi-carrier code division multi-access (MC-CDMA) communication technique. The time-varying collusion attack can be conveniently analyzed by drawing an analogy to the multi-access interference (MAI) problem in a wireless communication system with a time-varying channel response. As a result, many powerful tools from wireless communications can be borrowed to design a collusion-resistant fingerprinting system. They include codeword design, shifted spreading, pilot-based channel estimation, receiver design, etc. Furthermore, we present results on capacity, throughput, and distortion of a colluded media file. Finally, we will mention some open research problems.