Partially blind signature method based on identity

Abstract

The invention provides a partially blind signature method based on identity and relates to the technical field of information security. The partially blind signature method based on identity is capable of reducing the calculation complexity and improving the execution efficiency. The method comprises the following steps: public system parameters {G1, q, 1, P, G2, e, H1, H2, H3, QPKG} are established by PSK and an integer sPKG is randomly selected as a private key for secret storage from the integral multiplicative group as shown in the description of mod q; a signer sends own identity information as shown in the description to a private key generation center, the private key generation center generates the private key Did of the signer and sends the private key Did to the signer via a security authentication channel, and then the signal obtains the private key Sid and confirms that the private key is generated by the private key generation center; next, the signer signs; a verifier verifies the validity of the signature by use of the public key of the signer. The partially blind signature method based on identity can be applied to electronic cash, electronic voting and electron transactions.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to an identity-based partial blind signature method. Background technique [0002] As one of the means to ensure network information security, digital signature can effectively solve the problems of forgery, repudiation, impersonation and tampering in network information transmission, and is one of the core technologies in cryptography to protect data authentication, integrity and non-repudiation. A digital signature is some data attached to a data unit, which electronically signs the data information to confirm the sender of the message, thereby ensuring the security of the message. Digital signature technology has important application value in the fields of key distribution, electronic banking, electronic government bonds, electronic commerce and electronic government affairs. [0003] In 1976, Diiffer and Hellman proposed the public key cryptosystem, and on this ba...

AI Technical Summary

Problems solved by technology

In recent years, although identity-based partial blind signature schemes have been proposed one after another, most of them have disadvantages such as high computational complexity and poor practicability, so that identity-based partial blind signature schemes have not been widely used.

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