基于混合加法CA的光学流密码系统  

Optical System of the Stream Cipher Based on the Hybrid Additive Cellular Automata

作　　者：梁士利[1] 张占新[2] 郭景富[1] 隋永新[1] 古力[1] 杨怀江[1] 

机构地区：[1]中国科学院长春光学精密仪器机械与物理研究所应用光学国家重点实验室,吉林长春130022 [2]河北理工学院数理系,河北唐山063009

出　　处：《光电子．激光》2003年第5期509-511,共3页Journal of Optoelectronics·Laser

基　　金：973"国家重点基础研究发展规划资助项目(G199035804);中科院长春光学精密机械与物理研究所青年创新基金资助项目(Q01L12)

摘　　要：提出一种新的光学流加密系统。此系统用加法混合细胞自动机(CA)作密钥发生器,用CA的细胞构造空间光调制器(SLM)的阵列,一种门限器件实现所需的CA规则,整个系统可用光电混合或完全光学器件实现。模拟分析显示,用480×640像元CCD,加密速度可达到144Kbits/s,产生的密钥序列最大长度为2N-1(N为初始阵列细胞数目),直接攻击此加密系统需要的计算资源成指数性增长。A new optical stream cipher for security applications was proposed. The stream cipher's security is enhanced by using hybrid additive cellular automata (CA). The number of CA arrays can be the pixels on the spatial light modulator (SLM), and a thresholding device unit realizes the CA rules. This system suited for both hybrid optoelectronic and all-optical implementation. Simulation results show that when use a COD with 480×640 elements, the speed of encryption is to 144 K bits/s, and the sequence length is 2N-1, where N is the initial number of cells. The direct cryptanalysis requires an exponentially growing amount of computational resources.

关 键 词：光学流加密系统 细胞自动机 空间光调制器 SLM CA 加法 

分 类 号：TN918[电子电信—通信与信息系统]