Design Of Three Kinds Of Heterogeneous Signcryption Algorithms

With the development of informationization and digitization,people have higher and higher requirements on data security.As cross-platform operations become more and more frequent,homogeneous cryptosystems have been difficult to meet people's needs.Therefore,the research of heterogeneous cryptosystem has become one of the main directions of current cryptographers.Signcryption system achieves the functions of encryption and digital signatures.It guarantees confidentiality and unforgeability in the information and communication process.Most current signcryption schemes only consider the issue of secure communication between similar public-key cryptosystems.In real life,different computer and communication systems may adopt different public key cryptosystems.Some use the traditional public key cryptosystem.Some use identity-based public key cryptography.Some use certificateless public key cryptography.Therefore,we need to study the signcryption system that supports heterogeneous communication.This article is mainly from the following three aspects of research,details as follows:(1)Proposed an improved IDPKC ? TPKC heterogeneous signcryption scheme.Compared with the existing similar programs,the computing efficiency of the program has been improved to a certain extent.Only one bilinear pairing operation is needed when running the signcryption and unsigncryption algorithm,and under the random prophecy model,the scheme is proved to be confidentiality and unforgeability.(2)Proposed an efficient CLPKC? TPKC heterogeneous signcryption scheme.Compared with the existing schemes,the scheme only needs one exponentiation when running the signcryption algorithm.Only one pair of operation and exponentiation needs to be run when the unsigncryption algorithm is run.The computational efficiency has been greatly improved.At the same time,under the random oracle model,the scheme also meets the confidentiality and unforgeability in the communication process.(3)Proposed an anonymous IDPKC ? TPKC heterogeneous signcryption scheme.Compared with other existing schemes,this scheme only needs one exponentiation when running signcryption algorithm.When running the unsigncryption algorithm,it only needs one pair of operations and exponentiation.Calculation efficiency has been greatly improved.Under the random oracle model,it proves that the scheme satisfies confidentiality and unforgeability.At the same time,the program meets the anonymity of ciphertext.It effectively protects the privacy of the recipient and the sender.In the scheme,different system parameters are applied in the IDPKC and TPKC public key cryptosystems.This more effectively simulates the actual application scenario.