基于耦合锯齿混沌映射的虚拟光学加密系统

文中结合时空混沌系统具有初值和控制参数的高度敏感性，并能产生大量非相关的伪随机序列的特性，提出了一种基于耦合锯齿混沌映射生成虚拟光学加密系统的随机模板的方法。该方法基于交叉耦合映像格子模型，局部状态演化方程采用锯齿混沌映射，构成时空混沌系统。实验结果表明，当耦合系数ε的取值小于0．01时，基于交叉耦合映像格子模型的锯齿混沌系统可以生成具有均匀分配的混沌序列。经Matlab仿真实验证明，该加密系统密钥的灵敏度高，在一定的密钥长度下可以抵抗暴力破解。

An Encryption System of Virtual Optical Lens Imaging Based on Coupled Sawtooth Chaos Map

In allusion to the fact that spatiotemporal chaotic system produces a large number of uncorrelated pseudo-random sequences and is very sensitive to the chaotic initial value and control parameters, a method to generate the random template of encryption system of virtual optical lens imaging based on spatiotemporal chaos of coupled sawtooh map is proposed. The method is based on cross-coupled map lattice with the local evolution equation using sawtooth chaos map. Experimental results show that when the value of coupling coeffi- cient e is less than O. O1 ,the image grid model based on cross coupling of the sawtooth chaotic systems can generate chaotic sequences with uniform distribution. The simulation result revealed that the key of this encryption scheme has high precision and this encryption scheme can resist brute force attack in certain key space.