Aiming at the high complexity of coding of secure network, this paper proposes a secure network coding algorithm based on sparse matrix. The sparse matrix has a fast computing speed and occupies smaller memory space, so the algorithm transforms the information source news with sparse matrix. The algorithm can achieve the information-theoretic security condition at a high probability. Simulation results confirm that the algorithm can increase the encoding and decoding rate, reduce the computational complexity and the memory space.%针对安全网络编码复杂度较大的问题,提出一种基于稀疏矩阵的安全网络编码算法.利用稀疏矩阵占用较少的存储空间和运算速度快的优点,在信源处将信源信息与稀疏矩阵进行矩阵变换操作,使得随机网络编码能以较高的概率达到信息论安全的要求.仿真结果表明,该算法能提高编解码速率,降低复杂度,减少存储空间.
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