A Research And Realization Of Image Enciphering Based On Chaos

Recently digital image has become a major way to achieve information, and how to secure image information has also been a problem which is extensively concerned. Chaotic signals produced by chaotic system possess such features: analogous noise, complex structure, complicated analysis, extreme sensitivity to the initial conditions; so it is possible to fabricate a very good image encrypting system making use of these features.Based on the feature of chaotic dynamics, this thesis analyzes the features of many models of chaotic dynamics during image encryption, compares equal-shifting researches(computer simulation experiment), combines some specific methods in modern encrypting system, taking chaotic signal as carrier to conceal image information; in order to encrypt image. In addition, it picks chaotic system as pseudo-random sequence generator, adopts a way to multi-chaos compound, and combines image displace to design practical image encryption algorithm and exploit experimental system of image encryption.