多源网络编码文件传输过程中易遭受污染攻击,为此提出一种新的安全多源网络编码方案.首先给出多源网络编码签名规则,然后结合基于离散对数问题的安全辅助算法,构建抗污染攻击的安全多源网络编码签名方案,并对其正确性与安全性进行了形式化证明,由离散对数问题的困难性保证方案的安全.与其他方案相比,新方案具有签名长度短,安全模型实用性强,计算复杂度低等特点.%The multi-source network code files are vulnerability to pollution attack in the transmission process,for this reason a novel secure signing program is presented accordingly. First,the multi-source network coding signature rules are presented,then combined with security auxiliary algorithm, the anti-pollution attack is constructed based on the discrete logarithm problem. The security, correctness and completeness of our scheme are discussed in this paper. The security of our scheme relies on difficulty of the discrete logarithm problem. Compared with the known approaches, the new scheme has the characteristics of short signature length, strong practical security model and low computational complexity.
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