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为解决现有基于同态MAC的网络编码抗污染方案中代间污染的问题,提出一种基于密钥预分配策略的高效抗污染方案。通过将网络中所有认证节点密钥与代标识符进行实时绑定,使网络节点在对不同代的消息检测时,可以自主更新认证密钥,实现了各代消息独立认证的功能。该方案可有效地阻止代间污染攻击,保持了同类方案计算效率较高的特点,而且进一步提升了该类方案的网络适应性。
In order to solve the problem of the interprogeny pollution in the existing network coding anti-pollution schemes based on homology MAC, a highly effective anti-pollution scheme based on key pre-distribution strategy is proposed. Through real-time binding of all the authentication node keys and generation identifiers in the network, the network node can autonomously update the authentication key when detecting different generations of messages, thus achieving the function of independently authenticating each generation of messages. This scheme can effectively prevent the generational contamination attack, maintains the high computational efficiency of similar schemes, and further enhances the network adaptability of such schemes.