CAJ | 학술논문

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。
이용여Tent Map탁복공액적량류혼돈계통，이급산생독립균균분포밀약류적방법，설계료일충통용적류가밀방안。차방안유사수자신봉，단전체과정중불전수구체가밀사용적밀약류，지전수수궤산생적Tent Map초치이급량개계통적삼수치작위계통밀약，산생량렬독립동분포적밀약류대원시도상진행량차밀문반궤이혹가밀。해방안체도초시치엄개적목적，증가료절획자파역적난도。도상가밀적실험결과현시해방안안전차유효。
A general chaotic stream encryption scheme is proposed by using two chaotic systems which topologically conjugate with Tent map and a method to generate independent and identically distributed chaotic streams. The stream encryption scheme is similar to the digital envelop, but the difference is that we only transport the initial values of Tent map and the parameters of the two chaotic sys-tems as the initial key. According to the conjugate relation, the initial values of the chaotic systems are obtained to achieve the purpose of masking these initial values. We calculate two independent and identically distributed chaotic key streams based on the two chaotic systems to encrypt the plaintext through twice feedback XOR. An application result of image cryptograph illustrates that the stream en-cryption scheme is effective and secure.