A Novel Image Encryption Scheme with 2D-Logistic Map and Quadratic Residue
Zhu He-gu · Journal of Northeastern University · 2014
Considering the importance of image transmission in the public net,a new image encryption algorithm w as proposed based on the 2D-Logistic chaos and quadratic residue. Firstly, the original image w as shuffled tw ice w ith the 2D-Logistic chaos map,and the positions of the original image w ere changed sufficiently. Then, the shuffled image w as turned into a binary sequence,and every 8 bits w ere called a block. For each block, quadratic residue w as applied to encrypt the block, then, the encrypted binary sequence w as turned into the encrypted image. Therefore,the statistical information of plain image w as changed drastically by the proposed scheme. The proposed image scheme w as tested by various types of experiment and security analyses such as histogram analysis, information entropy, key sensitivity and correlation coefficient analysis. All these analyses demonstrated that the proposed scheme can resist statistical attack, information entropy attack, and it is very proper for secure image communication.