Image Chaotic Encryption Algorithm Based on Sampling Without Replacement
Bo Qin · Jisuanji gongcheng · 2009
Aiming at defects which are exiting in image encryption algorithm based on chaotic sequences,this paper proposes an image chaotic encryption algorithm based on sampling without replacement.Chaotic sequences are one-to-one and high-stochastically transformed to image pixel address by using variable modular arithmetic and technique of indirect address image,realizing position scrambling and gray disturbing for image encryption.There is no strict restriction on distribution of chaotic sequences,so both parameter and initial value of chaotic sequences are as secret keys.Compared with existing similar methods,the experimental results show that this algorithm has advantages such as more superior performance, high operation speed,and easy realization.