Research Of RSNC-based Mechanism Against Content Pollution Attack Method In Named Data Networking

In rencent years,although the Internet has shown great resilience over the years,the changes of applications,user requirements,and usage patterns in Internet have significantly strained it.In the security,content distribution efficiency,mobility and other aspects,as an outstanding representative of content-centric network research,Named data networking(NDN)has a very excellent advantage.And NDN can effectively solve the exposed problems of existing IP network architecture,which will play a vital role in the future network research.NDN names the data instead of naming the physical address.And all nodes in the NDN have a cache function to meet the content request to enter the node.However,caching the entire data block in the router makes the cache inefficient.In order to improve cache efficiently,one content can be divided into some small chunks.Network coding employing chunk-based transmission mechanism facilitates content distribution for NDN,which improves caching efficiency.But,NDN is likely to cause content pollution attacks because of the cache mechanism and network coding.First of all,this thesis reanalyzes the problem of NDN content pollution attack caused by the dependency of cache and the problem of Intra/Inter-GPAs caused by the network coding,and puts forward to the new data security requirement.Because signature is an effective method to solve the problem of content pollution attack,this thesis constructs a modle of new signature scheme based on RSNC(Request-Specific Network Coding,RSNC)mechanism,including communication model,new packet type and new node model.Then,under the new signature scheme model,this thesis proposes a RSNC-based mechanism homomorphic signature scheme by introducing the homomorphic hash into RSNC which is a new network coding mechanism.The scheme has been improved as follows: Considering the data relevance,the content name is bound to the content by the homomorphic signature of the transmitted content chunk and the content name,which not only guarantees the validity of the data but also guarantees the data relevance.The scheme specifies how the interest packet requests a coded chunk,which can ensure that the content consumer receives a linearly independent coded chunk to recover the original data.The RSNC mechanism makes the file increase a cache hit ratio based on the block transfer mechanism.In the end,under the NDN communication model,in order to verify the ability of the resistance to the content pollution attack in RSNC-based mechanism homomorphic signature scheme,the thesis has to prove and analyze its safety for the new signature scheme.By the security analysis and proof,the new method can guarantee the network performance while ensuring the validity and relevance of the data.And it can resist the Inter-GPAs in the case of multi-generation transmission.Then,the functions of the scheme are analyzed and compared,and it can be observed that the scheme is more security and higher hit rate.