摘要
提出了一种基于Clifford超混沌映射的图像加密方案,发送方利用Clifford映射快速地产生混沌序列,对图像在时域作加密预处理;然后通过简单的加法模运算对像素的灰度值进行替换与扩散,并且在每次迭代中采用不同的密钥。经通信双方同步之后,接收方即可解密出原始图像。实验结果表明本方案是可行的,并对系统密钥空间、密钥敏感性等密码学特性进行了分析。
Based on Clifford super chaotic map, a novel image secure communication scheme was proposed. In this scheme, the process of confusion permutes a plain-image with Clifford map for the pretreatment, and process of diffusion is based on additive modular arithmetic. In every iteration, the arithmetic adopts the different keys. Once the synchronization of the communication between the sender and recevier is satisfied, the encrypted image can be correctly recovered into the source image. The results of computer numerical stimulation indicate the sheme proposed is feasible. Finally, we analyzed some cryptography properties of the scheme such as the key space and the sensitivity of the encrypted with respect to the secret key.
出处
《计算机科学》
CSCD
北大核心
2009年第8期273-275,共3页
Computer Science
基金
国家高技术研究发展计划(863)项目(2007AAJ127)
空军预研项目(KJ08053)资助
