基于同态MAC的网络编码抗代间污染安全方案

摘要

To address the inter-generation pollution issue in present homomorphic MAC-based schemes,an efficient solution for network coding is proposed based on key pre-distribution.By binding the secret key with the identifier of the transmitting generation,every node can be able to renewal its authentication key in real time online,and thus realizes independent verification to different generations.The scheme can prevent inter-generation pollution effectively,maintain the high computational efficiency characterized by the same type schemes,and also enhance the network adaptability.%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.