摘要
提出用FPGA技术实现混沌数字图像加密及其硬件实现的一种新方法。根据离散化和数字化处理技术,对三维Lorenz混沌系统作离散化处理,用硬件描述语言和FPGA技术产生三维Lorenz混沌迭代序列,分别对数字图像的红、绿、蓝三基色信号进行混沌加密和解密。基于芯片型号为EP2C35F672C6的FPGA开发平台,以640×480BMP格式的灰度图像为例,设计了Lorenz混沌序列对数字图像进行加密与解密算法,给出了FPGA硬件实现结果。
A novel method for realizing chaotic digital image encryption and its hardware implementation based on FPGAis presented. According to discrete and digital process technology, three-dimensional Lorenz chaotic system is discretized and Lorenz chaotic iteration sequence is generated by using Hardware Description Language （VHDL） and FPGA technology. Red, green, and blue tricolor signals of image are encrypted and decrypted, respectively. On the basis of FPGA exploitation platform with EP2C35F672C6 chip, taking gray image with 640×480 BMP format as an example, the digital image encrypted and decrypted algorithm using Lorenz chaotic sequence is designed, and FPGA hardware implementation result is also given.
出处
《通信技术》
2008年第12期343-346,共4页
Communications Technology
基金
国家自然科学基金(批准号:60572073)
广东省自然科学基金(批准号:5001818)资助项目
