摘要
基于时空混沌设计了一种图像加密系统。将128比特长度的加密密钥划分成2个等长的子密钥,分别驱动2个不同的混沌系统以产生时空混沌序列矩阵,再与原始图像异或实现图像的加密处理。对系统的分析结果表明,该系统不但具有容易快速实现、密钥空间大等特点,而且利用混沌系统对初值参数的敏感依赖性,很好地实现了对密钥的敏感特性。本系统可广泛应用于Internet上的数字图像加密传输。
In this paper, a digital image encryption system is presented based on spatiotemporal chaos, in which a 128 bits secret key is divided into two halves subkey to derive two deferent chaotic systems respectively, in order to gener ate spatiotemporal chaotic sequence matrix, and this matrix will be XOR processed with the source image later. The a nalysis results indicate that this encryption system can be fast easily implemented, and has a large key space. Moreo vet, this system is also very sensitive to the secret key, by introducing the nature feature of the chaos into the design of the system such as the sensitivities with respect to initialconditions and control parameters. In last, the encryption sys tern designed in this paper can be widely applied to the digital image encryption transmission in Internet.
出处
《计算机科学》
CSCD
北大核心
2006年第12期83-85,共3页
Computer Science
基金
国家自然科学基金(60573047)
重庆市科委自然科学基金(CSTC
2005BB2050
2005BB2286)
重庆市教委科学技术研究项目基金(KJ051402
KJ051501)。
