A Fast Color Image Encryption Algorithm Using 4-Pixel Feistel Structure.
Algorithms using 4-pixel Feistel structure and chaotic systems have been shown to resolve security problems caused by large data capacity and high correlation among pixels for color image encryption. In this paper, a fast color image encryption algorithm based on the modified 4-pixel Feistel structure and multiple chaotic maps is proposed to improve the efficiency of this type of algorithm. Two methods are used. First, a simple round function based on a piecewise linear function and tent map are used to reduce computational cost during each iteration. Second, the 4-pixel Feistel structure reduces round number by changing twist direction securely to help the algorithm proceed efficiently. While a large number of simulation experiments prove its security performance, additional special analysis and a corresponding speed simulation show that these two methods increase the speed of the proposed algorithm (0.15s for a 256*256 color image) to twice that of an algorithm with a similar structure (0.37s for the same size image). Additionally, the method is also faster than other recently proposed algorithms.
Key Laboratory of Mathematics, Informatics and Behavioral Semantics, Ministry of Education, Beijing 100191, China.|School of Mathematics and Systems Science, Beihang University, Beijing 100191, China.
Wang
W
Yao
Key Laboratory of Mathematics, Informatics and Behavioral Semantics, Ministry of Education, Beijing 100191, China.|School of Mathematics and Systems Science, Beihang University, Beijing 100191, China.
Faguo
F
Wu
Key Laboratory of Mathematics, Informatics and Behavioral Semantics, Ministry of Education, Beijing 100191, China.|School of Mathematics and Systems Science, Beihang University, Beijing 100191, China.
Xiao
X
Zhang
Key Laboratory of Mathematics, Informatics and Behavioral Semantics, Ministry of Education, Beijing 100191, China.|School of Mathematics and Systems Science, Beihang University, Beijing 100191, China.
Zhiming
Z
Zheng
Key Laboratory of Mathematics, Informatics and Behavioral Semantics, Ministry of Education, Beijing 100191, China.|Sino-French Engineer School (École Centrale de Pékin), Beihang University, Beijing 100191, China.
Zhao
Z
Wang
AVIC Economics & Technology Research Establishment, Beijing 100029, China.
Wenhua
W
Wang
Educational Equipment Research & Development Center, Ministry of Education, Beijing 100080, China.
Wangjie
W
Qiu