Certificateless multivariable broadcast multi-signature method

A multi-signature and multi-variable technology, applied in the field of network information security, to resist quantum computing attacks and verify the small amount of computation
CN110190957AActive Publication Date: 2019-08-30XIAN UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN UNIV OF POSTS & TELECOMM
Publication Date
2019-08-30

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Abstract

The invention discloses a certificateless multivariable broadcast multi-signature method. The method comprises the steps of establishing system parameters, generating part of keys, generating signature keys, performing signing and performing verifying. The invention provides a certificateless multivariable broadcast multi-signature method by combining a certificateless public key cryptosystem anda broadcast multi-signature technology under a multivariable public key cryptosystem, and the method solves the problem of key hosting of the identity-based public key cryptosystem. The final multi-signature length is irrelevant to the number of signers, the verification time of the multi-signature is consistent with the verification time of a single part of signature, and the method has the advantages of signature, small verification calculation amount, quantum computing attack resistance and the like, and can be applied to the fields of vehicle-mounted networks, education systems and the like.
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Description

technical field

[0001] The invention belongs to the technical field of network information security, and specifically relates to cryptography or a multivariable public key cryptosystem or a certificateless public key cryptosystem or a broadcast multi-signature method. Background technique

[0002] Multi-signatures are divided into ordered multi-signatures and broadcast multi-signatures according to the order of signatures. It can realize multiple users to sign and authenticate the same electronic file. At present, most broadcast multi-signatures are based on traditional public key cryptosystems, and their security is mainly based on the intractability of large integer decomposition problems or discrete logarithm problems. The emergence of quantum algorithms and the imminent birth of quantum computers will pose a threat to the broadcast multi-signature method based on traditional public key cryptography, and the identity-based broadcast multi-signature method has key escrow p...

Claims

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