基于LDPC码的Logistic混沌序列加密算法

孟祥彩; 王中训

光电技术应用, 2017, 32 (5): 62, 网络出版: 2017-11-21

基于LDPC码的Logistic混沌序列加密算法

Logistic Chaotic Sequence Encryption Algorithm Based on LDPC Coding

论文大纲

孟祥彩王中训

作者单位

烟台大学光电信息科学技术学院,山东烟台 264005

LDPC码 Logistic混沌序列加密 low density parity check (LDPC) coding logistic chaotic sequence encryption

摘要

Logistic混沌序列是一种加密序列,增强了信息序列的安全性,将LDPC信道编码方案应用于Logistic混沌序列中。首先随机产生混沌序列,用混沌序列置乱水印,然后对水印信息进行LDPC编码调制,嵌入宿主图像DCT域中,最后实现了双重加密,从而提高了信息传输过程中的抗干扰能力,降低了误码率,增加了传输系统的稳定性。

Abstract

Logistic chaotic sequence is an encryption sequence, which enhances the security of the information sequence. At first, low density parity check (LDPC) channel coding is applied to logistic chaotic sequence. The chaos sequence is generated randomly, and the watermark is scrambled with the sequence. And then, LDPC coding modulation is applied to the watermark message which is embedded to discrete cosine transform (DCT) domain of the host image. At end, double encryption is realized. Thus, the capacity of resisting disturbance during information transmitting process is advanced, the error rate is reduced and the stability of the transmitting system is increased.

参考文献

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孟祥彩, 王中训. 基于LDPC码的Logistic混沌序列加密算法[J]. 光电技术应用, 2017, 32(5): 62. MENG Xiang-cai, WANG Zhong-xun. Logistic Chaotic Sequence Encryption Algorithm Based on LDPC Coding[J]. Electro-Optic Technology Application, 2017, 32(5): 62.

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