摘要
设计了一种基于LFSR状态序列密钥生成算法的混沌序列图像加密方案.方案中的混沌映射的初始值由LFSR状态序列生成,用于加密图像的混沌序列都在1个周期内.利用LFSR产生连续的128b的状态序列,把128b的状态均分成4个32b模块并作为混沌映射的初值,第一模块作为混沌映射初值生成混沌序列用于图像的置乱变换,其他模块作为初值生成混沌序列用于图像扩散加密序列.仿真结果表明:加密方案中的128b的密钥初值可以保证密钥空间足够大;用于加密的序列总保持在1个周期内,且由于混沌映射的初值敏感性,这种加密方案等价于一次一密;方案可以对批明文图像进行处理,提高了加密效率.经过实验和安全性分析,提出的方案是非常有效的.
An chaotic sequence image encryption scheme based on LFSR state sequences is being proposed in this paper.Chaotic map inkial value is produced by LFSR state sequences,chaotic sequences for image encryption are in a period.Continuous 128b state sequences are produced by LFSR,and each 128b state sequence is divided into four parts and changed into chaotic map initial values.The first initial value produced permutation chaotic sequence and the other initial values produced three image encryption chaotic sequences.Simulation indicated thai 128b initial value makes algorithm key space enough big;Encryption key sequences are in a period which not only makes sure sequence random but also algorithm one-time pad.This,scheme can encrypt batch images.All experimental results and security analysis Show the efficiency of the proposed method.
作者
邢宇航
李敏
Xing Yuhang;Li Min(Rocket Force of Engineering University,Xi'an 710025)
出处
《信息安全研究》
2018年第4期336-341,共6页
Journal of Information Security Research
基金
国家自然科学基金项目(61102170)
国家社会科学基金项目(15GJ003-243)
作者简介
邢宇航,博士研究生,主要研究方向为信息安全、密码学和图像处理.manxyh404@163.com;李敏,教授,博士生导师,主要研究方向为信息与网络空间安全,图像处理与目标识别.clwn@163.com.
