CAJ | 학술논문

基于半导体激光时滞混沌映射,提出一种新的加密算法.用Ikeda方程产生的二进制序列掩盖明文,对明文块做依赖于密钥的置换,并用传统的混沌加密方法加密.在每一轮加密过程中,都会用一个与混沌映射、明文和密文相关的随机数对时滞项做微扰,以提高算法的安全性;状态转移函数不仅与密钥相关,而且与本轮输入的明文符号以及上一轮输出的密文符号相关,有效地防止了选择明文/密文攻击.仿真实验表明,该算法可行、有效.
기우반도체격광시체혼돈영사,제출일충신적가밀산법.용Ikeda방정산생적이진제서렬엄개명문,대명문괴주의뢰우밀약적치환,병용전통적혼돈가밀방법가밀.재매일륜가밀과정중,도회용일개여혼돈영사、명문화밀문상관적수궤수대시체항주미우,이제고산법적안전성;상태전이함수불부여밀약상관,이차여본륜수입적명문부호이급상일륜수출적밀문부호상관,유효지방지료선택명문/밀문공격.방진실험표명,해산법가행、유효.
An encryption approach based on chaos in semiconductor lasers with electro-optical delayed feedback loop is proposed.To mask plaintext,we use chaotic map of semiconductor lasers subject to electro-optical feedback modeled by Ikeda equations to generate binary sequences.The plaintext block is permuted by a key-dependent shift approach and then encrypted by a classical chaotic masking technique.In each encryption turn,feedback is perturbed by a random number which depends on chaotic map,plaintext and ciphertext.State transfer function depends not only on the secret key,but also on the input plaintext of the turn and output ciphertext of the last turn to avoid chosen plaintext/ciphertext attack.Simulations show that the proposed cryptographic scheme is feasible and effective.