A new method of information encryption

Aiming at high fidelity image only can be encrypted in time domain, summarize the current all kind of encryption methods in time domain. That are only chaos permutation, only chaos encryption and hybrid encryption algorithm. Then, this paper proposed the block chaos image scrambling and chaos encryption with after effect. In the block permutation, give the formula of correlation and compare the correlation before and after permutation. After the hybrid encryption, computing the information entropy of encrypted image. At last, according to the security analysis, the image encryption algorithm demonstrates strong resistance toward exterior attacks such as statistical attacks and differential attacks.