Research On Cross-PKG Security Mutual Trust And Interworking Mechanism In Internet Of Things

With the continuous advancement of technology and the rapid evolution of communication technology,the information era is moving forward.The communication between human are no longer statisfied and human hoped to be able to interconnect between human and things.The Internet of Things transmits and shares data in different locations and different systems through various sensors to realize the connection between objects and things.However,due to differences in protocols or architectures between devices,Io T devices cannot directly communicate with each other,and because of the performance limitations of devices in the Io T environment and their high relevance to people's lives,the encryption methods in things of Internet have to be more lower power consumption and higher security requirements than in traditional communication.In recent years,the introduction of IBE(Identity-based Encryption)has solved the complicated certificate maintenance work of traditional public key encryption and realized certificateless public key encryption.HIBE(Hierarchical Identity-based Encryption)is proposed on the basis of an identity-based encryption scheme,which solves the performance bottleneck problem of a single PKG(Private Key Generator).It is more suitable for the Io T environment with a large number of nodes.However,there are still some problems in the Hierarchical identity-based encryption scheme.For example,users in systems managed by different private key generation institutions need to access across domains,but users in different systems cannot directly authenticate each other's identity and communicate with each other.In the existing solutions,private key generation mechanisms of different systems mostly use the same system parameters,and there is room for improvement in the consumption of encryption when performing specific communications,so they are not fully adapted to the environment of the Internet of Things.This dissertation studies the cross-domain problem of the application of Hierarchical identity-based encryption in the Internet of Things.According to the architecture of the Hierarchical identity-based encryption scheme,the Io T communication system scheme based on the layered identity encryption is designed,and a complete set of cross-domain authentication solutions and communication mechanisms are proposed.The main achievements are:(1)Aiming at the problem that Io T device standards do not communicate with each other and are difficult to interoperate,the application platform is used to solve the problem of heterogeneous interconnection,and a HIBE-based Io T device communication system design is designed,with the private key generatr as the link,designed corresponding message transfer module is designed to process the messages sent in the system,so as to achieve the purpose of intercommunication between different Io T devices.(2)A complete set of solutions is proposed for the cross-domain problem of the hierarchical identity-based encryption scheme.The private key generation institutions in different systems are used as cross-domain authentication gateways,Different systems separately manage the users they manage.For identity authentication,the private key generation agencies in different systems perform mutual identity authentication to achieve indirect completion of node cross-domain authentication.A session key agreement mechanism is designed to transfer the session key,and the session key is used to reduce the encryption consumption during communication without losing security.(3)Based on the JPBC and PBC libraries,a simulation experiment was carried out on the scheme in this paper,which realized the authentication and key negotiation of the nodes under different PKGs,and completed the encrypted communication,verified the feasibility of the scheme,and gave the scheme using the session key After the efficiency comparison.