Color image encryption algorithm and its decryption method protecting from shearing attack
Liao Qi-nan · Jisuanji gongcheng yu sheji · 2011
In order to protect digital color image's information,a color image encryption algorithm based on Lorenz chaos sequence and its decryption method protect from shearing attack are presented.Firstly,3D Lorenz chaotic sequences are improved to be with ideal pseudo-randomness.Then,the RGB components image's pixel positions are shifted and the pixel value is altered based on the 3D sequence so that the image will be scrambled and encrypted.While doing the decryption,a method is provided based on the neighboring pixels characteristic to renew the image attacked by shearing.Lastly,the effects of encryption,decryption and security are also analyzed by using the method of accessing.Theoretical analysis and experimental results show that the algorithm has a large space of keys,a good encryption and decryption effects and efficiency,a better security performance to statistical analysis and strongly against shearing attacks ability.