Heterogeneous Signcryption With Different System Parameters And Its Application In 5G Network

In recent years,domestic and foreign information leakage incidents occur frequently.In the severe security situation,it is very important to ensure the safe transmission of information.Signing and encrypting the data that needs to be transferred can ensure the confidentiality and unforgeability of the data.Signcryption can complete the data signature and encryption in a logical step.Public key infrastructure(PKI)is widely used in many fields.Certificateless public key cryptosystem(CLC)has become a hot topic of research due to its lack of certificate management and key escrow.In this paper,the general and security models of heterogeneous signcryption algorithms using different system parameters between public key infrastructure and certificateless cryptosystem are defined based on bilinear pairs.Based on the general model,two signcryption algorithms are designed,and the discrete logarithm problem(DLP)and decision Diffie-Hellman problem(DDHP)are used in the random oracle model to prove that our signcryption algorithms can realize the confidentiality and unforgeability of data.In addition,signcryption algorithm can guarantee the security of data transmission in the case of temporary session key loss.Compared with the existing algorithms in terms of security and computation,the algorithms we designed have certain advantages.The booming development of 5G network brings more possibilities for future broad applications and services.Network slicing is an important technology for 5G network to realize network diversity and application.By studying and analyzing the architecture of 5G network slices,this paper finds that there is a problem of secure communication between different slices.5G network slices will use different security policies according to their own physical resources and the services they need to provide,including the deployment of different cryptographic systems.Therefore,most of the existing signcryption algorithms are not very practical.We constructed a 5G network security communication scheme based on heterogeneous signcryption algorithms with different system parameters.While ensuring the safe transmission of data between slices of different 5G networks,the transmission efficiency is also considered.