Signature scheme for network coding against inter-generation pollution attacks
Tianli Peng · Beijing Hangkong Hangtian Daxue xuebao · 2015
The concept of generation is introduced into network coding so as to adapt to the needs of realtime application. Considering that network coding is vulnerable to inter-generation pollution attacks and causes message crosstalk,a generation-identifier based signature scheme for network coding was proposed. Firstly,the two-level private keys,including the generation private key and the message private key,both derived by the generation identifier were set. This procedure enabled nodes to judge the generation attribute of messages and decided whether to continue coding. Secondly,a signature algorithm was constructed with homomorphic property by using the bilinear pairing. Meanwhile the two-level private keys were separated to verify signatures by batch,which made nodes verify all the massages of the same generation simultaneously. Finally,through the analysis of random oracle model,the scheme was proved secure against adaptively chosen message attack.The result indicates that the scheme can reduce computation cost and improve performance of the system.