论文部分内容阅读
运用密码分析学的方法对双随机相位加密系统进行了初步的安全性分析.研究结果表明,该系统属于线性的对称分组密码系统,线性性质为其安全性留下隐患.在已知明文攻击下,攻击者可通过常规的相位恢复算法获得4-f系统输入平面的随机相位函数密钥,继而可轻易推出频谱平面的随机相位函数密钥,从而攻破此密码系统.
The preliminary security analysis of double stochastic phase encryption system is carried out by using the method of cryptanalysis.The results show that the system belongs to the linear symmetric block cipher system and the linear nature leaves a hidden danger to its security.With the known plaintext attack , An attacker can obtain a random phase function key of the input plane of the 4-f system through a conventional phase recovery algorithm and then can easily break the cryptosystem by simply introducing a random phase function key of the spectrum plane.