EURASIP Journal on Information Security 
Volume 2008 (2008), Article ID 803217, 15 pages
doi:10.1155/2008/803217
Research Article

Novel Attacks on Spread-Spectrum Fingerprinting

Hans Georg Schaathun

 Department of Computing, University of Surrey, Guildford, Surrey GU2 7XH, UK
Received 9 May 2008; Accepted 7 August 2008

Recommended by Stefan Katzenbeisser

Abstract

Spread-spectrum watermarking is generally considered to be robust against collusion attacks, and thereby suitable for digital fingerprinting. We have previously introduced the minority extreme attack (IWDW '07), and showed that it is effective against orthogonal fingerprints. In this paper, we show that it is also effective against random Gaussian fingerprint. Furthermore, we develop new randomised attacks which counter the effect of the decoder preprocessing of Zhao et al.