Error function attack of chaos synchronization based encryption schemes
Xingang Wang, Meng Zhan, Choy Heng Lai, Gang Xiang Hu · Chaos An Interdisciplinary Journal of Nonlinear Science · 2003
Different chaos synchronization based encryption schemes are reviewed and compared from the practical point of view. As an efficient cryptanalysis tool for chaos encryption, a proposal based on the error function attack is presented systematically and used to evaluate system security. We define a quantitative measure (quality factor) of the effective applicability of a chaos encryption scheme, which takes into account the security, the encryption speed, and the robustness against channel noise. A comparison is made of several encryption schemes and it is found that a scheme based on one-way coupled chaotic map lattices performs outstandingly well, as judged from quality factor.