Construction method for one-time anonymous signcryption of public key

Abstract

The invention discloses a construction method for one-time anonymous signcryption of public key and aims to complete the construction method for the one-time anonymous signcryption of the public key by the aid of a computer system. The computer system comprises a UA (user A), a UB (user B) and a TC (trusted center), and the UA, the UB and the TC are mutually communicated. The construction method includes seven steps of 1), generating computer system public key; 2), generating user partial secret key; 3), generating user secret key; 4), generating one-time public key; 5), subjecting the one-time public key to validity verification; 6), performing signcryption; 7), unsigncrypting. Compared with the prior art, the construction method has both anonymity and traceability, and can effectively prevent one-time attacks of malicious users and untrusted attacks from the TC inside a system. Meanwhile, the construction method has high computational efficiency and low communication costs as compared with conventional methods.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a construction method of anonymous signcryption with a one-time public key. Background technique [0002] Due to the openness and sharing of the network, it is vulnerable to various malicious attacks. Network users often face security issues such as passwords, account numbers and other important information disclosure, loss or damage to data integrity during communication and transmission. To protect sensitive data transmitted by users, there are usually ways such as certificate-based public key system, identity-based and blind signature. [0003] Certificate Based Public Key Cryptosystem (Certificate Based Public Key Cryptosystem) refers to the user U i According to its own private key s i Calculate and generate public key P i , and then submit a certificate application to the trusted certificate authority CA (Cerrificate Authentication) to obtain the...

AI Technical Summary

Problems solved by technology

[0018] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a construction method of one-time public key anonymous signcryption, which solves the existing problems in the prior art: excessive certificate management overhead in the certificate-based public key system; long-term Using the same identity will expose the user’s sensitive information; lack of traceability, the identity of malicious users cannot be determined; illegal users can forge private keys and certificates, and create signatures for deception; registered and non-registered users can forge signatures; in a pervasive environment The receiving side faces the threat of a one-time attack by malicious entities; it cannot resist malicious attacks by trusted centers and other issues

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