Markov分割混沌系统图像加密算法的FPGA实现  

FPGA implementation of image encryption algorithm based on chaos system with Markov portion

作　　者：马超[1,2] 刘泉[1,2] 章明朝[1] 李佩玥[1] 隋永新[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春130033 [2]中国科学院大学大珩学院,北京100039

出　　处：《计算机工程与设计》2015年第4期846-850,共5页Computer Engineering and Design

基　　金：国家973重点基础研究发展计划基金项目(2007CB311201);应用光学国家重点实验室开放基金项目(Y1Q03FQK02);吉林省科技发展计划基金项目(20130522120JH)

摘　　要：为得到一套复杂度高、安全性好、计算代价小的图像密码算法,对一种基于Markov分割混沌系统的图像加密算法进行改进,在不影响其复杂度和安全性的情况下,使其更符合FPGA的设计思想,利用verilog HDL语言在开发板XC5VLX110T上得到实现。进行lena图的加密、解密效果演示与仿真,仿真结果表明,加密后图像完全掩盖了原始图像的特征和信息,拥有足够的安全性;对加密图像进行解密后,成功得到了原始图像,验证了系统的正确性;得益于FPGA的硬件并行性,其效率高于利用其它平台进行实现。To get an image encryption algorithm with the features of high complexity,good safety and low cost of computing,a kind of image encryption algorithm based on chaos system with Markov portion was improved,it was made accord better with the idea of FPGA design without affecting the complexity and security of the algorithm,and it was realized on the development board XC5VLX110 Tusing Verilog HDL.Then,the encryption and simulation results indicate that the cipher image is safe enough because the characteristic of the original image was broken,which made it undistinguishable.And after decrypting the encrypted image,the original image was got,which verified the correctness of the system.Additionally,due to the hardware parallelism of FPGA,the efficiency of algorithm is much higher than that of those designed on other platforms.

关 键 词：图像加密 Markov分割 混沌 现场可编程门阵列 密钥 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]