Research On Heterogeneous Signcryption Schemes With Special Properties

With the rapid development of Internet of Things in the context of big data,how to achieve secure and efficient transmission and use of data in an open network has become a current research hotspot.Encryption can realize the confidentiality of data,and signature can realize non-repudiation of data.The signcryption technology is a fusion of encryption and signature,which can satisfy the confidentiality and unforgeability of data at the same time.Most of the existing signcryption schemes have problems,such as only supporting communication in same cryptographic systems,high computational overhead,and difficult retrieval of ciphertexts.To solve these problems,this paper combines three application scenarios in the Internet of Things to conduct the following research on heterogeneous signcryption schemes:(1)For the problem of secure and efficient data transmission between heterogeneous cryptographic systems in the Internet of Vehicles,a heterogeneous aggregation signcryption scheme is proposed.Using heterogeneous signcryption technology,the secure one-way communication from the certificateless cryptosystem to the public key infrastructure is realized,which avoids the key escrow problem and ensures the confidentiality and unforgeability of data.Using aggregated signcryption technology,batch verification of data by receivers is realized,which improves verification efficiency and reduces computational overhead.The analysis results show that the scheme has lower computational overhead.(2)To solve problems of high certificate management costs and low ciphertext retrieval efficiency,a heterogeneous signcryption scheme supporting multi-ciphertext equality test is proposed with the application of smart grid.The scheme realizes the heterogeneous secure communication from identity-based cryptosystem to certificateless cryptosystem,eliminates the certificate management problem in traditional public key cryptographic schemes,and ensures the confidentiality and authenticity of power data by using heterogeneous signcryption technology.The multi-ciphertext equality test technology is introduced to realize the secure and efficient retrieval of multiple power ciphertexts by users at the same time.Compared with similar schemes,this scheme satisfies more functional and security features,and has lower computational overhead.(3)For the problems of high computational cost and lack of supporting for multi-ciphertext retrieval,based on the operation without pairing,a heterogeneous signcryption scheme for Internet of Drones supporing multi-ciphertext equality test is proposed.The use of heterogeneous signcryption technology ensures the authenticity and confidentiality of data,realizes the secure communication from public key infrastructure to certificateless cryptosystem,and avoids the key escrow problem.The multi-ciphertext equality test technology is adopted to realize batch testing of ciphertexts.By the use of non-pairing operation,the calculation efficiencies of the signcryption,unsigncryption and test phases are improved.The analysis results show that the scheme has lower computational overhead and achieves higher security.