基于RSA的多源网络编码签名方案

由于网络编码极易遭受污染攻击的破坏,文中基于RSA问题的难解性提出了一种适用于多源网络编码同态签名方案,以应对污染攻击和重放攻击.该方案能够阻止恶意修改的数据分组,被污染的数据分组会被验证者丢弃,从而保证了系统的安全性.由于方案是为多源网络编码设计的,不需要额外的安全信道,且采用线性计算,大大降低了对结点计算能力的要求,节省了结点的验证时间.此外,通过引入消息代序号,该方案可以防止代间重放攻击.

RSA-based signature scheme for multi-source network coding

Because network coding is very vulnerable to pollution attacks,a novel homomorphic signature for multi-source network coding scheme based on the difficulty of RSA problem is proposed in the paper.It is to prevent pollution attacks and replay attacks.This scheme can prevent malicious modification of data packets and polluted data packets will be discarded by the verifier to ensure the security of the system.Our scheme is specially designed for multi-source network coding.It does not need any extra secure channel and uses the linear calculations,so it greatly reduces the requirements of computing power of the node and the verification time of the node.In addition,the scheme can prevent replay attacks by using the serial number of the message generation.