Anonymous signcryption method from identity public key system to certificate public key system

Abstract

The invention discloses an anonymous signcryption method from an identity public key system to a certificate public key system. The anonymous signcryption method specifically comprises the steps that parameters are randomly selected from a public key function database and system public keys and system private keys of the identity public key system and the certificate public key system are generated; a public key and a private key of a user are generated according to the public keys and the private keys and the system parameters; anonymous signcryption is performed to a message by using a bilinear pair, the private key of the user of the identity public key system and the public key of the user of the certificate public key system, and a ciphertext is sent to a receiver; the receiver performs designcryption to the ciphertext according to the bilinear pair and the private key of the receiver and simultaneously authenticates the identity of a sender. The anonymous signcryption method from the identity public key system to the certificate public key system has the advantages of simple implementation process and high transmission efficiency, and can be used for realizing the confidentiality, authentication and anonymity of information transmitted from the identity public key system to the certificate public key system.

Description

technical field [0001] The invention belongs to the technical field of information security, and relates to anonymous signcryption, in particular to an efficient anonymous signcryption method from an identity public key system to a certificate public key system, which can be used to realize the transformation from an identity public key system to a certificate public key system Confidentiality, authentication and anonymity of transmitted messages. Background technique [0002] Information security is one of the important issues facing the information society, and information security has become an important factor restricting the development of network technology. Modern cryptography is the theoretical basis of information security, and confidentiality and authentication are two important security goals in cryptography. Confidentiality of messages can be obtained by encryption with a basic cryptography technique. Encryption can be seen as a transformation that transforms r...

AI Technical Summary

Problems solved by technology

However, in practical applications, in order to protect their privacy, the sender of the message often does not want any third party to know the source of the message

In the existing signcryption method from the identity public key system to the certificate public key system, since the identity of the sender is directly exposed in the signcrypted ciphertext, the existing method cannot achieve the anonymity of the message, and the user's identity is leaked. privacy

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