基于混沌序列的双重加密安全网络编码方案设计  

Design of secure network coding scheme by double encryption based on chaotic sequences

作　　者：徐光宪[1] 赵越 公忠盛 

机构地区：[1]辽宁工程技术大学电子与信息工程学院,辽宁葫芦岛125105

出　　处：《计算机应用》2017年第12期3412-3416,共5页journal of Computer Applications

基　　金：国家科技支撑计划项目(2013BAH12F02);辽宁省高等学校杰出青年学者成长计划项目(LJQ2012029)~~

摘　　要：针对当前对抗全局窃听的网络编码方案计算量大、占用带宽大、安全性不高等问题,提出一种基于混沌序列的双重加密方案。首先,利用密钥对传输数据的最后一维进行加密,加密时用数据本身扰动混沌序列;然后,用另一密钥和随机数密钥生成编码系数矩阵,此时用m序列对混沌序列进行扰动;最后,用得到的编码系数矩阵对未加密消息和加密消息进行线性组合,实现对抗全局窃听。由于编码系数矩阵是由密钥生成的,不需要在信道中传输编码系数,相对于实体网络编码(SPOC)方案,所提方案节省了网络中对编码系数传输的带宽开销。分析和实验结果表明,该方案提高了网络的安全性能,对唯密文攻击和已知明文攻击都能起到作用,并且提高了传输效率,算法复杂度适中。Concerning the problems of the existing network coding schemes against global wiretapping attack such as large amount of computation, low bandwidth efficiency and low security, a secure network coding scheme by double encryption based on chaotic sequences was proposed. Firstly, a key was used to encrypt the last dimensional transmission data and the chaotic sequences were disturbed by the data itself while encrypting. Then, another key and a random number key were used to generate coding coefficient matrix, while the chaotic sequences were disturbed by m sequence. Finally, the obtained coding coefficient matrix was used for the linear combination of encrypted messages and unencrypted messages against global wiretapping attacks. Since the coding coefficient matrix was generated by the keys, the coding coefficients were not needed to be transmitted in the channel. Compared with the traditional Secure Practical Network Coding （SPOC） scheme, the proposed scheme saves the bandwidth overhead of the transmission of coding coefficients in the network. The analysis and experimental results show that, the proposed scheme improves the safety performance of network, which ciphertext-only attacks and known plaintext attacks can all be resisted. And the proposed scheme can also improve the transmission efficiency, and its algorithm complexity is moderate.

关 键 词：全局窃听 混沌序列 M序列 唯密文攻击 已知明文攻击 

分 类 号：N309.7[自然科学总论]