Security analysis of ‘A novel copyright protection scheme using Visual Cryptography’

Digital image copyright protection techniques have drawn substantial interest from the research community for the last two decades. In particular, Copyright Protection schemes based on Visual Cryptography (CPVC) are designed to protect sensitive images without degrading the quality of host images. In this paper, the security of one such CPVC scheme proposed by A. Nag et al. is analyzed. We demonstrate that this technique is insecure as it leads to high ambiguity in detecting the right owner. This is proved by means of theoretical analysis and by conducting false positive tests.