Research On Method And Technologies Of Anonymous Network Dynamic Design

With the rapid development of computer network and information technology,as an important means to hide the network identity information,anonymous network is playing a more and more important role in various industries.Anonymous network protect our privacy,but also faced with endless security threats.Traditional anonymous network can't resist the rapid development of tracking technology because of its static nature.In order to solve this problem,we proposed a theory of dynamic anonymity network design(DAND).We proposed the mechanism of DAND by studying Tor anonymous network deeply,combined with the theory of moving target defense.We proposed dynamic routing algorithm based on bandwidth of anonymous network.We also applied the design of dynamic protocol to the Tor network and implemented a LAN switching equipment to dynamically change IP address for directory server.The main results are as follows:1.After deep research on the theory of moving target defense and working principle of traditional anonymous network,we proposed a theory of DAND.We proposed a hybrid model of anonymous network framework.We also proposed the strategies of randomization,timing selection and configuration synchronization based on mechanisms of DAND.2.We presented a dynamic routing algorithm based on bandwidth of anonymous network and the validity is verified by simulation experiments.3.We applied dynamic protocol design methods to Tor network.We presented directory server design based on dynamic IP address.We also improved Tor network by diversified packet format and analyzed the security of dynamic protocol based on the probabilistic model.4.We implemented a system called DIT_device,which could switch the identifications of each participant in the protocols.With dynamically switching the IP address,this system could resist the penetration and scanning of the attacker in the network.According to the results of experiments,the system reached the function goal of communication and the security goal of dynamic switch.