Detection on the falsifier of multimedia fingerprinting code using PCA method

There is a trend to increase against illegal digital copy and distribution so that the copyright protection is to be a necessity of multimedia content. According to the reasons, this paper deals with trace and detection of the falsifier who made a falsification code using one´s user code, which is a multimedia fingerprinting code based on BIBD (v, k, λ). In block design, the incidence matrix M of BIBD is transformed to complement matrix C then the C´s row vector or column vector will be fingerprinting code of each User. One user wants to falsify ones fingerprinting code using shift operation instead of the collusion with other users. As verified results of the falsification code using PCA method, it confirms that the number of the detected falsifiers is k+1 among n Users on the relationship between of the falsified code Groups and each User.