RT - Journal Article T1 - Image Encryption Using Tent Chaotic Map and Arnold Cat Map JF - ITRC YR - 2012 JO - ITRC VO - 4 IS - 3 UR - http://ijict.itrc.ac.ir/article-1-176-en.html SP - 13 EP - 19 K1 - Image encryption K1 - Permutation K1 - Substitution K1 - Arnold Cat map K1 - Chaotic Tent map AB - In this paper, a new algorithm for image encryption using chaotic tent map and Arnold cat map is proposed. This algorithm consists of two major phases, permutation and substitution. In the permutation phase, Arnold cat transform is used. A pseudo random image is produced using the chaotic tent map. In the substitution phase, the permuted image is Exclusively ORed to this pseudo random image in order to generate encrypted images. A computer simulation is used to evaluate the proposed algorithm and to compare its results to encrypted images of other methods. The criteria for these comparisons are chi-square test of histogram, correlation coefficients of pixels, NPCR (number of pixel change rate), UACI (unified average changing intensity), MSE (mean square error) and MAE (mean absolute error). These comparisons show that the proposed chaotic image encryption method has a high performance and security. LA eng UL http://ijict.itrc.ac.ir/article-1-176-en.html M3 ER -