坐标逻辑异或滤波器融合密钥图的多图像一次填充无损加密算法  

The Study on Image Encryption Algorithm for One-time Pad Based on the Coordinate Logic-XOR Filter and Key Image

作　　者：高彦卿[1] 

机构地区：[1]南阳理工学院软件学院,南阳473004

出　　处：《科学技术与工程》2014年第16期119-128,共10页Science Technology and Engineering

摘　　要：为了使图像加密系统能够利用一个密钥可同时对多个图像完成一次填充加密,提出了坐标逻辑异或滤波器(CLFXOR-coordinate logic filter-XOR)耦合密钥图的多图像一次填充无损加密算法;并构建了"初步加密—密文分块—密文滤波"的新机制。引入图像检索规则,并联合与明文图像相同尺寸的密钥图,完成一次填充加密。将CLF-XOR引入到图像中,过滤明文像素坐标,得到了密钥图;并设计压缩XML密钥生成器,得到XML密钥;耦合元胞自动机的时空直方图,构造人工图像,得到图像描述符;并定义了密钥图与明文的融合规则,获取密文;将密文分块,再次利用CLF-XOR过滤每个密文块,产生最终密文。实验结果显示该算法具有优异的加密质量,计算效率高;可对多个明文同步完成一次填充加密;并具有很强的抗明文-密文攻击性能。In order to make the image encryption system has the function of using only one key to synchronization encrypt multiple image and producing different cipher, to realize nondestructive encryption and achieve one time pad encryption effect, the image lossless encryption algorithm based on the coordinate logic-XOR filter and cellular automata is proposed. The image retrieval technology is introduced to this algorithm, and use the key image with the same dimensions as the plain image to combination with the significant feature of image to achieve one time pad encryption. The coordinate logic-XOR filter（CL-XOR） is introduced into the plain image to filter the pixel coordinates to get the key image, the compact XML key generation is designed according to the key image to obtain the XML key, coupling the CA time-space diagrams to construct the artificial image for getting the image descriptor; and defining the integration rule between the key image and plain image to output the initial cipher; dividing the cipher into four blocks, and again using the CL-XOR to filter the cipher blocks to produce the final cipher. The matlab simulation results show that comparing with other algorithms, the encryption quality of this algorithm is best, not containing any statistical information; and the performance of anti-known plaintext attack as well as the anti-cipher attack are excellent.

关 键 词：坐标逻辑异或滤波器 元胞自动机 一次填充 图像检索 图像描述符 密钥图 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]