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利用与Tent Map拓扑共轭的两类混沌系统,以及产生独立均匀分布密钥流的方法,设计了一种通用的流加密方案.此方案类似数字信封,但传递过程中不传输具体加密使用的密钥流,只传输随机产生的Tent Map初值以及两个系统的参数值作为系统密钥,产生两列独立同分布的密钥流对原始图像进行两次密文反馈异或加密.该方案达到初始值掩盖的目的,增加了截获者破译的难度.图像加密的实验结果显示该方案安全且有效.
A general flow encryption scheme is designed by using two types of chaotic systems that are conjugate with the Tent Map topology and a method of generating an independent and uniformly distributed key stream. The scheme is similar to a digital envelope, but the transmission is not transmitted in the specific encryption The key stream, which only transmits the randomly generated Tent Map initial value and the parameter values of the two systems as the system key, generates two columns of independent and identically distributed key streams to perform X-ciphertext feedback XOR encryption on the original image. The purpose of the initial value concealment is increased, which makes it harder for the intercepter to decipher.The experimental results of image encryption show that the scheme is safe and effective.