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网络编码已被证明可以用来提高网络的吞吐量,但是网络编码系统却极易受到污染攻击,对网络编码系统中消息的签名与验证也与传统网络中所使用的方法不同,网络编码允许中继和接收结点对编码后的消息进行验证以抵御污染攻击。提出了一种基于同态公钥密码的网络编码签名算法,其中利用一次一密的方法,使签名私钥随报文的改变而更新,使攻击者难以破获签名私钥假造报文以进行污染攻击。
Network coding has been shown to improve network throughput, but network coding systems are extremely vulnerable to pollution attacks. Signing and verification of messages in network coding systems are also different from those used in traditional networks. Network coding allows Following and receiving nodes to verify the encoded message against pollution attacks. This paper proposes a network coding signature algorithm based on homomorphic public key cryptography, in which the signature private key is updated with the message by using a one-time and one-secret method, making it difficult for the attacker to crack the signature private key forgery message to pollute attack.