CAJ | 학술논문

基于两个离散混沌动力系统提出了一种新的序列密码算法。该算法用分段非线性映射的上一次迭代的输出作为分段非线性映射的下一次迭代的输入，并将迭代序列通过离散化算子转化为0-1序列，由0-1序列来选择两个混沌动力系统中的分段非线性映射。对算法进行了仿真实验和安全性分析，并对该映射产生的序列的随机性、初始值敏感性及其他性质进行了研究。研究结果表明，算法呈现出密钥、明文与密文之间高度的敏感性，密文和明文之间的相关度极小等特点，从而起到有效防止密文对密钥和明文信息泄露的作用。
기우량개리산혼돈동력계통제출료일충신적서렬밀마산법。해산법용분단비선성영사적상일차질대적수출작위분단비선성영사적하일차질대적수입，병장질대서렬통과리산화산자전화위0-1서렬，유0-1서렬래선택량개혼돈동력계통중적분단비선성영사。대산법진행료방진실험화안전성분석，병대해영사산생적서렬적수궤성、초시치민감성급기타성질진행료연구。연구결과표명，산법정현출밀약、명문여밀문지간고도적민감성，밀문화명문지간적상관도겁소등특점，종이기도유효방지밀문대밀약화명문신식설로적작용。
A new stream cipher algorithm is designed based on two discrete chaotic dynamical systems.The algorithm uses the front output of the piecewise nonlinear map as the next input of the piecewise nonlinear map,and the iterative sequences are transformed into 0-1 sequence with discrete operator,and then,the 0-1 sequence is used to select the piecewise nonlinear maps of the two chaotic dynamical systems.The simulation test and security analysis are conducted to study the randomness, the initial value sensitivity and other properties of sequences generated by the map.The experimental results show that the algorithm has the characteristics of the high sensitivity of secret key,plaintext and ciphertext,and the small correlation between ciphertext and plaintext.These peculiarities can efficiently prevent ciphertext to leak the information of secret key and plaintext.