一种新的安全网络编码防窃听方案

A New Secure Network Coding Anti-eavesdropping Scheme

针对现有防窃听的网络编码方案存在计算复杂性过高,加密量过大,带宽负载过大等问题,提出一种低复杂度的安全网络编码防窃听方案。首先选取信源消息第一列中的一个消息对该列的其他消息随机化,通过AES加密系统对选取的信源消息进行加密。由加密后的一列数据生成稀疏的预编码矩阵,用该矩阵对剩余的信源消息线性运算,实现防窃听。经实验证明,相对于传统方案,该方案在不占用带宽情况下,能有效地提高编解码速度,降低计算量。

Aiming at the problems of high computational complexity, large amount of encryption, and excessive bandwidth load in existing network coding schemes for anti-eavesdropping, a low-complexity secure network coding anti-eavesdropping scheme is proposed. Firstly, a message in the first column of the source message is selected to randomize the other messages in the column, and the selected source message is encrypted by the AES encryption system. A sparse precoding matrix is generated from a column of encrypted data, and the matrix is used to perform linear operations on the remaining source messages to achieve anti-eavesdropping. Experiments show that, compared with the traditional scheme, this scheme can effectively improve the speed of encoding and decoding and reduce the amount of calculation without occupying the bandwidth.