基于CRC的防污染网络编码方案

Pollution-Resistant Network Coding Based on CRC

网络编码的直接应用容易遭受污染攻击,我们针对这一安全性问题,给出了一种基于CRC校验码的防污染网络编码方案.该方案首先通过引入快速的并行CRC校验码和消息时间戳的设计理念,然后结合具有同态性质的RSA签名算法,来确保校验码和时间戳的安全.从该方案的安全性方面和效率方面进行分析表明:网络编码、并行逆序CRC检验码和消息时间戳三者的结合可以有效地抵抗污染攻击和重放攻击,并且大大地降低节点的计算代价,提高了网络的吞吐量.

The direct application of network coding is vulnerable to pollution attack. In order to solve this security problem, we propose a network coding scheme to prevent it from pollution based on CRC check code. First, this protocol employs a fast parallel CRC check code and message timestamp to effectively resist pollution attack and replay attack. Secondly, by combining with the homomorphic properties of RSA signature algorithm, we ensure the security of CRC and timestamp. Security analysis and efficiency analysis show that applying network coding, parallel CRC check code and message timestamp together can greatly reduce the computational cost of the node and improve the network throughput.