基于混沌系统的商标图像加密算法

A trademark graphic encryption algorithm based on discrete chaotic system

商标图像的加密目的是在商标可识别的基础上对其进行加密,使非法接收方无法获得完整的商标图像,从而达到保护商标所有权的目的。本研究基于三维离散混沌系统与DNA计算法则,针对企业商标图像提出了一种新的加密算法。首先利用混沌系统所产生的伪随机序列扰乱商标中的每个像素位置,再将置乱后的像素矩阵通过DNA序列进行扩散产生加密商标。在接收端,通过上述过程的反变换,可完全恢复出正确的商标图像。实验仿真结果表明,该算法具有良好的安全性能与加密效果,可以有效抵御常规的攻击方式,为注册商标的保护提供了技术保障,具有较好的实际应用价值。

In order to protect the ownership of trademark,the encryption of trademark images is performed on the basis of the recognizable precondition to avoid the illegal receiver can obtain the complete trademark.Based on three-dimensional discrete chaotic system and DNA encryption algorithm,a novel encryption algorithm for enterprise trademark image is proposed.The pseudo-random sequence generated by the chaotic system is used to disturb the position of each pixel in the trademark,and then the scrambled pixel matrix is diffused by DNA sequence to generate the encrypted trademark.In the receiving terminal,the correct trademark image can be completely restored through the reverse transformation of the above process.The experimental simulation results show that the algorithm has good security performance,large key space and better defensive capability.The trademark encryption algorithm based on chaotic system and DNA sequence can provide technical support for the protection of registered trademarks,and has good potential of practical application.