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Certificateless partially blind signature method

A partially blind and certificateless technology, applied in the field of information security, can solve problems such as poor practicability, low execution efficiency, and complex algorithms, and achieve the effect of eliminating the disadvantages of fully blind signatures

Inactive Publication Date: 2014-03-12
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complex algorithm and low execution efficiency of this scheme, the practicability is poor.

Method used

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  • Certificateless partially blind signature method
  • Certificateless partially blind signature method
  • Certificateless partially blind signature method

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Embodiment Construction

[0028] refer to figure 1 , the present invention is a partial blind signature method without a certificate, and its implementation steps are:

[0029]Step 1, the key generation center PKG establishes system parameters, the specific steps are as follows:

[0030] (1a) According to the safety requirements, determine the size of the safety factor l and the prime number q, and use the elliptic curve to construct the bilinear map e(G 1 ,G 1 ) → G 2 The cyclic addition group of 1 ,+> and the cyclic multiplicative group 2 , >, for the sake of simplicity, the present embodiment selects the P-192 elliptic curve on the prime number field recommended by the National Institute of Standards and Technology NIST;

[0031] (1b) Choose the following collision-free hash function H: {0,1} * →G 1 and This embodiment selects the hash function SHA-1;

[0032] (1c) Integer multiplication group from modq Randomly choose an integer s from PKG As its own private key, and calculate Q PKG =s ...

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Abstract

The invention relates to a certificateless partially blind signature method. In the prior art, practicality of the partially blind signature method is low. The method of the invention is mainly used to solve the above problem. The method comprises the following steps that: 1) a secret key generation center randomly selects an integer sPKG as a private key in an integer multiplication group of mod q and stores secretly, and discloses a system parameter: (G1, q, 1, P, G2, e, H, h, QPKG); 2) a signer generates the partial private key s1 and a partial public key Q1, the secret key generation center generates the other partial private key S2 and the public key Q2 and sends to the signer through a safe authentication channel, and the signer acquires a private key pair (s1, S2) and a public key pair (Q1, Q2); 3) the signer carries out signature; 4) an authenticator verifies validity of the signature by using the public key pair (Q1, Q2) of the signer. By using the method of the invention, a demand to a certificate can be eliminated. There is no disadvantage of secret key escrow. A partial blind characteristic is possessed. Simultaneously, the method is simple and high efficient and possesses good practicality and security. The method can be used in an electronic cash transaction and electronic voting.

Description

technical field [0001] The invention belongs to the technical field of information security and relates to a partial blind signature method without a certificate, which is suitable for digital signature and authentication, especially for electronic cash transactions and electronic elections. Background technique [0002] As one of the means to ensure the security of network information, digital signature can effectively solve the problems of forgery, repudiation, impersonation and tampering in the transmission of network information. It is one of the core technologies to realize the security of electronic transactions. Non-repudiation and other aspects have important applications. It has important application value in the fields of key distribution, e-banking, e-bonds, e-commerce and e-government. [0003] However, in some special cases, the message owner not only wants the signer to sign the information he owns, but also does not want the signer to know the content of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/32H04L9/30
Inventor 刘景伟孙蓉何剑辉白宝明
Owner XIDIAN UNIV
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