| A fast image encryption algorithm based on only blocks in cipher text |
| |
| 作者姓名： | 王兴元 王倩 |
| |
| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant Nos.61370145,61173183,and 60973152);the Doctoral Program Foundation of Institution of Higher Education of China(Grant No.20070141014);the Program for Liaoning Excellent Talents in University,China(Grant No.LR2012003);the National Natural Science Foundation of Liaoning Province,China(Grant No.20082165);the Fundamental Research Funds for the Central Universities,China(Grant No.DUT12JB06) |
| |
| 摘 要： | In this paper, a fast image encryption algorithm is proposed, in which the shuffling and diffusion is performed simul- taneously. The cipher-text image is divided into blocks and each block has k x k pixels, while the pixels of the plain-text are scanned one by one. Four logistic maps are used to generate the encryption key stream and the new place in the cipher image of plain image pixels, including the row and column of the block which the pixel belongs to and the place where the pixel would be placed in the block. After encrypting each pixel, the initial conditions of logistic maps would be changed ac- cording to the encrypted pixel＇s value; after encrypting each row of plain image, the initial condition would also be changed by the skew tent map. At last, it is illustrated that this algorithm has a faster speed, big key space, and better properties in withstanding differential attacks, statistical analysis, known plaintext, and chosen plaintext attacks.
|
| 关 键 词： | 图像加密算法 密文 选择明文攻击 逻辑映射 帐篷映射 初始状态 密钥空间 差分攻击 |
A fast image encryption algorithm based on only blocks in cipher text |
| |
| Abstract: | image encryption, shuffle and diffuse simultaneously, block cipher, logistic map |
| |
| Keywords: | image encryption shuffle and diffuse simultaneously block cipher logistic map |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
