Research On Security Network Coding Scheme Against Pollution Attack

In today's information society,human life and the Internet are inseparable.With the increasing number of Internet applications,people put forward higher requirements on network performance,especially bandwidth.How to realize the maximum flow of the network under the limited network bandwidth resources has become an problem that can't be ignored.The development of network coding technology has made people see the hope of solving this problem.Compared with the storage and forwarding of the intermediate nodes in the traditional network system,the intermediate nodes of the network coding system recode and combine the messages,which can effectively reduce network congestion and improve the reliability and robustness of the network.Although network coding can bring a lot of benefits to network performance,it is extremely vulnerable to malicious attacks in the network,especially the pollution attack.Because the intermediate nodes of network coding need to re-encode and combine the received messages,even if a very small amount of pollution messages appear in the network,the polluted messages will continue to "infect" other messages after being forwarded by the coding combination,resulting in pollution continues to expand the network,sink nodes will not be able to restore messages sent by the source,wasting valuable network bandwidth.Pollution attack has seriously affected the application of network coding in real life.It is of great significance to research of secure network coding scheme against pollution attacks for the practical application of network coding.This paper mainly focuses on the problem of the pollution attack in the network coding system under single source multicast network environment.Based on the idea of pseudo-random function,homomorphism and null space,two security solutions are proposed to solve the network coding pollution attack problem.This paper first discusses a kind of resistance label pollution attacks network encoding scheme,and then proves that this scheme has no immunity to the pollution attacks between different generations of messages.Finally,by using pseudo-random function to improve the original scheme,proposed a secure network encoding scheme can resist both the message of different generations between attack and pollution label pollution attacks,and use matlab simulation performance comparison.In this paper,we study a secure network coding scheme based on the homomorphic MAC and zero-space combination.By studying the problem that the intermediate nodes of homomorphic MAC scheme cannot be checked and the effect of the null space scheme is not ideal when it is used alone,we propose a network coding scheme based on homomorphic MAC and null space combination.The combination of programs can not only ensure the integrity of the message will not be destroyed,but also the intermediate nodes in the network can verify the message.Finally,the correctness of the scheme is proved and the performance of the scheme is compared with that of other schemes.