基于数字签名的防污染网络编码方案

Pollution-Resistant Network Coding Scheme Based on Digital Signature

网络编码技术对于提高网络吞吐量、均衡网络负载、提高带宽利用率、增强网络的鲁棒性等方面都有明显的优势,但是无法直接抵抗污染攻击.最近,学者提出了基于同态哈希函数的签名方案,可以较好检测污染攻击,但是很难定位被污染的节点.本文结合两者的优势提出了一个基于数字签名的网络编码方案,该方案不仅能够抵抗污染攻击,而且能有效地确定出攻击源的位置,从而降低污染攻击对网络造成的影响,并提升网络的健壮性.

Network coding technology has obvious advantages for improving networks throughput,balancing network load,improving bandwidth availability ratio, enhancing robustness of networks, but it can＇t resist against pollution attacks directly. Recently, scholars propose the signature scheme based on homomorphic Hash function, which could better detect pollution attacks, but it is difficult to locate the contaminated node. This paper proposes a network coding scheme based on the digital signature by combining with the advantages of both. It can not only resist pollution attack, but also can effectively identify position of attack source. Thus, it reduces the impact of pollution attacks to the network and enhances the robustness of the network.