Research On Reliable Transmission Technology For Covert Communication Network

In the Internet environment,factors such as user groups,user behaviors,and usage scenarios cannot be fully perceived and controlled,thus facing threats such as sensitive data theft,traceability and malicious blocking during data transmission.Currently,VPN technology based on encryption algorithms and anonymous communication network technology based on onion routing both have technical limitations,such as a single transmission channel,obvious protocol characteristics,and lack of concealment.Therefore,this papers proposes a multi-path covert transmission model,constructs multi-dimensional covert transmission channels,and uses data network coding technology to achieve multi-path transmission protocol,to achieve reliable transmission capabilities against blocking and tracing.The main contributions of this papers include the following aspects:A multi-path covert transmission model is proposed.This model adopts a joint optimization architecture of "central controller-core switching network",designs control system architectures such as forwarding layer,control layer,and network layer.At the same time,the covert transmission channel is configured and managed,such as node configuration management,path configuration management,channel congestion control and other dynamic algorithm mechanisms to achieve identity hiding,node hopping,multi-path transmission techniques.Finally,experimental evaluations are conducted in an uncontrolled Internet environment,and compared to traditional TCP,VPN,and anonymous communication networks represented by Tor as experimental control objects.The experimental results show that this model has high anti-tracing ability and covert transmission ability.A multi-path transmission protocol based on data network coding is proposed.Based on the multi-path covert transmission model proposed in this papers,a multi-path transmission protocol is designed using network coding technology.To address the limitations of IP packet size restrictions and reduced data payload space due to carrying too much security information,this papers proposes an efficient and robust transmission letter format to achieve secure addressing and hierarchical encapsulation techniques.At the same time,a novel data network coding technology is proposed,which uses mathematical operation laws to encode and split information,achieves data decentralized transmission,and releases the orderliness limitation of information arrival.This solves the problems of data leakage and inability to recover due to data loss,tampering,etc.,and achieves reliable data transmission.Through simulation experiments validation and comparison with other coding schemes,the multi-path transmission protocol designed in this papers can support reliable transmission of multiple paths and has good usability.On the basis of global Internet cloud servers,this papers designs,deploys,and tests a multi-path covert transmission model and transmission protocol,and develops a prototype system.The key technologies have been practically verified and implemented,achieving good practical results and value.The research achievements of this papers aim to achieve reliable transmission technology for covert transmission networks,which has good practical significance and value.This achievement can provide practical support for the design and research of new types of covert communication networks.