Research On Multiple-source Distribution And Security Protection Of Information-centric Networks

At present,network and communication technologies are developing rapidly.Content services such as text and multimedia are gradually becoming the main body of the network.When users request information,they pay more attention to the content itself and do not care about the location of the content.The TCP/IP architecture has been unable to adapt to the development needs of the network.Information-Centric Networks(ICN),which effectively enhances network mobility,scalability,security,and service quality,is more suitable for the current technological development as a next-generation network architecture.Like the TCP/IP architecture,ICN is only suitable for normal network conditions.When the link delay between nodes is small and the node has a connected path during communication,ICN can ensure that information is normally routed,distributed,and cached.In a resource-constrained environment with large delays,frequent interruptions,and insufficient node energy,ICN cannot complete the basic communication process.Multi-source distribution is the core mechanism of ICN,and efficient multi-source distribution algorithm can improve the efficiency of ICN information transmission.Multi-source distribution requires multi-node collaboration,requiring frequent exchange of information between multiple nodes or between nodes and servers,depending on stable network conditions.If there are large delays and interruptions in the nodes in the network,the efficiency of multi-source distribution is directly affected,and its efficiency is even lower than that of single-source distribution.This paper designs and implements the ICN multi-source efficient distribution mechanism,and can still achieve excellent performance in a limited environment.In this paper,the delay/interrupt tolerance characteristics of ICN are optimized,and the ICN architecture can operate normally in a resource-constrained network environment with large delays and frequent interruptions.It is an extension of ICN in a complex network environment and enhances the adaptability of ICN.The universal cache feature of ICN improves network performance on the one hand,and introduces security issues on the other hand.The most typical is cache pollution.The cache pollution attack changes the content distribution in the node cache,reduces the node request hit rate,increases the user content acquisition delay,and seriously affects network performance.The defense effect of the existing defense mechanism is selective to the type of attack,and usually has a significant effect on a certain type of attack.In the process of defending against pollution attacks,defenses can only be based on certain strategies.The defense mechanism cannot be adjusted according to the attack type,strength,and parameters of the attacker,and the dynamic adaptability is weak.The universal cache feature of ICN improves network performance on the one hand,and introduces security issues on the other hand.The most typical is cache pollution.The cache pollution attack changes the content distribution in the node cache,reduces the node request hit rate,increases the user content acquisition delay,and seriously affects network performance.The defense effect of the existing defense mechanism is selective to the type of attack,and usually has a significant effect on a certain type of attack.In the process of defending against pollution attacks,defenses can only be based on certain strategies.The defense mechanism cannot be adjusted according to the attack type,strength,and parameters of the attacker,and the dynamic adaptability is weak.Based on the above mentioned problems,this paper implements the ICN multi-source efficient distribution mechanism,optimizes the ICN delay/interrupt tolerance characteristics,and designs the ICN cache pollution prevention mechanism based on game theory.The main work is as follows: 1)Designed an ICN multi-source efficient distribution mechanism to improve the efficiency of ICN distribution.This mechanism can be efficiently distributed in resource-constrained network environments with large delays and frequent interruptions.2)Optimized the ICN delay/interrupt tolerance characteristics,realized the normal communication of ICN in the restricted network with large delay and frequent interruption,and adapted ICN to various complex environments,which is an extension of the ICN architecture.3)The ICN delay/interrupt tolerance characteristic optimization model is designed.4)Designed the game-based ICN cache pollution prevention mechanism,built a cache pollution attack model,adjusted the specific parameters of the defense strategy based on the “Nash Equilibrium”,maximized the defender's revenue,and improved the network dynamic defense effect.5)By establishing a network simulation environment,the test verifies the optimization effect of the multi-source distribution mechanism on communication delay.The test verifies the defense performance of the ICN cache pollution prevention mechanism based on game theory.