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在无线网络通信进程中,攻击者能够通过捕获节点并对消息进行替换进而污染整个网络,降低了网络的安全性.网络编码可以极大地提高网络吞吐量,但直接应用网络编码无法有效的抵抗污染攻击.利用线性网络编码,提出一种可有效地抵抗污染攻击的认证码方案.该方案有3个特征:由可信中心利用中国剩余类定理解同余式组产生的唯一解作为信源私钥并进行密钥分发;允许除目的节点外的中间节点利用自己的私钥对接收的消息的来源和完整性进行认证而不需要通过解码;安全性高.最后从计算代价和存储代价两方面分析该方案的有效性.
In the process of wireless network communication, the attacker can reduce the network security by capturing the nodes and replacing the messages to pollute the whole network.Network coding can greatly improve the network throughput, but the direct application of network coding can not effectively resist the pollution Attack.Using linear network coding, a scheme of authentication codes that can effectively resist pollution attacks is proposed.This scheme has three characteristics: the trusted center uses the Chinese remainder class theorem to solve the unique solution produced by the congruence group as the information source Key and distribute the key; the intermediate node except the destination node is allowed to use its own private key to authenticate the origin and integrity of the received message without decoding; high security. Finally, from the calculation of the cost and the storage cost Analysis of the effectiveness of the program.