CAJ | 학술논문

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。
위득도일투복잡도고、안전성호、계산대개소적도상밀마산법，대일충기우 Markov 분할혼돈계통적도상가밀산법진행개진，재불영향기복잡도화안전성적정황하，사기경부합 FPGA 적설계사상，이용 verilog HDL 어언재개발판XC5VLX110T 상득도실현。진행 lena 도적가밀、해밀효과연시여방진，방진결과표명，가밀후도상완전엄개료원시도상적특정화신식，옹유족구적안전성；대가밀도상진행해밀후，성공득도료원시도상，험증료계통적정학성；득익우 FPGA 적경건병행성，기효솔고우이용기타평태진행실현。
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 XC5VLX110T using Verilog HDL.Then,the encryption and simulation results indicate that the cipher image is safe enough be-cause 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.