On the Randomness of Visual Cryptography Scheme
Teng Guo, Feng Liu, Chuan-Kun Wu, Yawei Ren, Wen Wang · 2013
The randomness of visual cryptography scheme (VCS) measures at least how many random bits are required to encode a secret pixel. In this paper, the randomness of decomposition-based VCS proposed by Ateniese et al. is reduced significantly.