为适应实时应用的需求,网络编码中引入了代的概念.针对网络编码易受代间污染攻击导致消息发生串扰的问题,提出了基于代标识符的网络编码签名方案.首先,方案中设置了依据代标识符生成的两级私钥,包括代私钥以及在此基础扩展成的消息私钥,以便节点判断消息的代属性来决定是否对它继续进行编码;其次,利用双线性对构造了具有同态性质的签名算法,通过分离两级私钥进行批验证,节点可同时验证同一代的所有消息.最后,通过随机预言模型分析,证明了该方案在适应性选择消息攻击下是安全的.通过开销分析表明方案能有效减少验证开销,提高系统性能. In order to meet the demand of real-time applications, the concept of generation is introduced into network coding.Aiming at the problem that network coding is prone to crosstalk caused by inter-generational pollution attack, a network coding signature scheme based on generation identifier is proposed.Firstly, The two-level private key generated according to the generation identifier includes the generation private key and the message private key expanded on this basis so that the node judges the generation attribute of the message and decides whether to continue coding. Secondly, The signature algorithm with homomorphism property is verified by separating two levels of private keys, and the node can verify all the messages of the same generation at the same time.Finally, through the analysis of stochastic prediction model, it is proved that the scheme is secure under the attack of adaptive selective message The analysis shows that the scheme can effectively reduce the verification overhead and improve the system performance.