多源网络编码同态签名方案*

由于网络编码的系统很容易受到污染攻击,提出了一个适用于多源网络编码应对污染攻击的同态签名方案.该方案使用了同态哈希函数,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.该方案是同态的且是为多源网络编码特别设计的,与文件和分组的大小无关,而且方案中的公钥和每个分组的开销是常量.

On homomorphic signature scheme for multi-source network coding

Because of network coding systems are very vulnerable to pollution attacks, in this paper, we propose a novel homomorphic signature schemes for multi-source network coding to prevent pollution attacks. This scheme makes use of the homomorphic hash function and prevent malicious modification of data packets. Polluted data packets will be discarded by the verifier and thus ensure the security of the system. Our scheme is homomorphic and specially designed for multi-source network coding and independent of the file or packet size: both public keys and per packet overhead being constant.