适用于保密容量为负情形的基于混沌序列的polar码加密方案

Chaotic sequence based polar code encrypted scheme in negative secrecy capacity case

考虑保密容量为负的情形,利用混沌序列对信息序列进行加密并且对冻结比特进行填充,并结合多块polar编码结构,提出了一种具有较低复杂度和较高安全传输速率的polar码加密方案。从可靠性、安全性、传输效率这3个方面对所提polar码加密方案进行相应的数学证明和理论分析。结果表明,所提方案在保密容量为负的情形下,在保障可靠、安全的通信的基础上,可达到较高的安全传输速率,且具有较低的实现复杂度。

A chaos based encrypted polar coding scheme,which could be applied to the negative secrecy capacity case,was proposed.Chaotic sequences were employed to encrypt the information bits and fill the frozen bits.And multi-block polar coding structure was also employed in the proposed scheme.The proposed scheme was featured as lower complexity and higher secrecy transmission rate.Corresponding mathematical analysis had been performed in terms of the error probability,security and transmission rate.The result reveals that the proposed scheme can achieve reliability,security in negative secrecy capacity case.What’s more,it has relatively low complexity and high secrecy transmission rate compared with the existing schemes.