利用Lorenz混沌系统实现红外图像加密的方案  

Infrared image encryption scheme using Lorenz chaotic system

作　　者：王聪丽[1,2] 陈志斌[1] 葛勇 

机构地区：[1]军械工程学院军械技术研究所,石家庄050003 [2]武警石家庄士官学校,石家庄050061

出　　处：《计算机应用》2015年第8期2205-2209,共5页journal of Computer Applications

摘　　要：为保证红外成像系统中红外图像的信息安全,克服采用传统图像加密时方法安全性不高、实时性差的缺陷,在分析红外图像比特为平面特征的基础上,提出了利用Lorenz混沌系统对红外图像进行加密的方案。在方案中,采用Lorenz混沌系统,针对红外图像比特位平面影响因子分布特征,只加密红外图像的最高四个比特位平面,一次性实现图像横、纵坐标和比特位平面加密,将图像加密层次由像素级扩展到比特级。和传统图像加密算法相比,该方案基于红外图像独特的位平面分布特征,加密速度快,性能好,能有效抵抗穷举攻击,具有良好的抗干扰性能和较高的置乱度。该方案可应用于安全级别要求高的红外监控系统中,提高系统安全性,有效防止黑客入侵。In order to ensure the security of infrared image in infrared imaging systems and avoid the shortages of traditional image encryption method such as low security and poor real-time performance, a new encryption scheme for infrared image by using Lorenz chaotic system was proposed based on the analysis of bit plane features of infrared image. In this scheme, based on the influence factor statistical characters of bit plane of infrared image, the abscissa, ordinate and bit plane of image＇s higher four bit planes were scrambled through one operation by using Lorenz chaotic system. This scheme extended image encryption form the pixel level to the bit level. Compared to traditional image encryption method, the scheme is based on the special bit plane statistical character of infrared image, and has fast encryption speed and good performance. It can resist exhaustive attack effectively and has good reliability and scrambling degree. The scheme can be applied to the infrared monitoring system with high security requirements to improve system security and prevent hacker intrusion effectively.

关 键 词：红外图像 加密 LORENZ混沌系统 比特位平面 

分 类 号：TN911.74[电子电信—通信与信息系统] TP751[电子电信—信息与通信工程]