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中文摘要：
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.
英文摘要：
In the progress of wireless network, attackers can pollute the whole network through substituting the messages when capturing the nodes, in this case, the security of the network may decrease obviously. Systems exploiting network coding to increase their throughput but exploiting network coding directly can not defense efficiently suffer greatly from pollution attacks. It proposed a secure scheme to address pollution attacks by source multicast messages to the destination adopting linear network coding techniques where the It has three merits： A trusted authority generate private key by exploiting chinese remainder theorem. Allowing intermediate nodes and destinations verify the messages＇ origin and its integrity with their private keys without decoding. High security, it discusses the efficiency of the proposed scheme from computational cost and storage cost.
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