Research On Certificateless Cross-Domain Signcryption Algorithm And Its Application

With the rapid development of network technology,the security of information is subject to enormous challenges.Ensuring information security is a concern of all people.An important measure to achieve secure communication is cryptography,and signcryption is an important part of modern cryptography.Compared with traditional pre-signature encryption,signcryption has obvious advantages in computational efficiency and communication cost.The certificateless public key cryptosystem(CLPKC)has been widely concerned because it not only reduces the complicated operation of certificate management,but also avoids key escrow defects based on the identity cryptosystem(ID-PKC).The certificateless signcryption formed by combining the certificateless cryptosystem and the signcryption is a research hotspot of modern cryptography.In addition,in recent years,because the concept of "domain" has been introduced into the research of encryption authentication under large-scale distributed systems,how to realize the information security interaction and cross-domain authentication between different systems has become a hot issue in today's network security research.Based on signcryption and cross-domain,this paper studies the direction of certificateless signcryption and heterogeneous signcryption,and the results are as follows:(1)Most certificateless signcryption schemes require bilinear pairing and cannot be used in cross-domain environments.This paper proposes an efficient certificateless signcryption scheme for cross-domain non-bilinear pairings.It proves the confidentiality and unforgeability of the scheme in the random oracle model.It also proves that the scheme has the property of known session-specific temporary information security that most schemes do not have.Finally,compared with other schemes,it shows that the scheme has superior performance and high security.(2)Most of the existing heterogeneous signcryption schemes only prove the security of the scheme under the random oracle model,and can not guarantee the security in practical applications.This paper proposes a suitable for the certificateless environment and the traditional public key.The heterogeneous signcryption scheme of environmental communication,and the system parameters in the two environments can be inconsistent,that is,cross-domain can be realized,and the confidentiality and unforgeability against the two type adversaries under the standard model are proved,and the property of known session-specific temporary information security is also proved.Compared with similar schemes,it shows that the scheme has higher computational efficiency and better practicability.(3)The application scheme design around cryptographic algorithm is also a research hotspot of modern cryptography.This paper introduces the concept of wireless body area network data transmission,and applies the designed certificateless signcryption algorithm to the wireless body area network environment.Then design a secure wireless body area network data security transmission scheme,which will achieve the confidentiality,integrity and authentication.