基于Turbo码的纠错加密联合编码方案

摘要

为了实现信息通信时纠错编码和加密的相结合,提出了一种在turbo编码器中融入加密算法的纠错加密联合编码方案。用混沌映射生成的伪随机二值序列密码对turbo编码器的第1路输出信息加密,同时控制第2、第3路分量编码器的生成矩阵;第1路加密算法是以Logistic映射产生的伪二值序列中0和1的位置信息将明文序列分成2部分,再分别对这2部分序列进行交织算法,并合并后得到加密的密文。对此方案进行了安全性和可靠性实验分析,仿真分析结果表明具有很好的纠错性能和安全性。%In order to achieve the combination of error-correcting coding and encryption in information communication,a joint error correction and encryption scheme is proposed.In this scheme,encryption algorithm is embedded into turbo encoder,and the first channel of output of the turbo encoder information is encrypted by stream cipher generated from the chaotic mapping.The second and the third channel of component of the encoder are controlled by the consistent stream cipher to generate matrix.Based on the position information of binary sequence of 0 and 1 produced by Logistic mapping,the encryption algorithm of first channel divides the plaintext sequence into two parts.Interleaving algorithm is applied to this two-part separately,and the ciphertext is extracted from the merger of the two parts.Experimental analysis on this scheme for the security and reliability shows that the scheme behaves pretty well in error-correcting performance and security.