Application of extended encryption algorithm in medical image
Zhiming Cui · Jisuanji gongcheng yu sheji · 2009
Mapping method about chaotic sequence is researched to encryption factor sequence using two-dimensional discrete chaotic model. Based on the design principle of Rijndael, and combined with the excellent sequence pseudo-random characteristics of Sequence encryption factor, a extended encryption algorithm is proposed. The Rijndael's ShiftRows, MixColumns and key schedule are improved and realizes that image encryption algorithm which scrambling the positions and substitute for the image pixel are combined. The experimental result shows that the encrypted image is similarly the white noise, to gain the good scrambling degree. Especially when ignoring the outer noise the algorithm realize the lossless encryption. It has good application prospect and is applicable to medical image of requesting the high confidentiality.