Digital signature method and device

Abstract

The invention relates to the technical field of communication, in particular to a digital signature method and device, and the method comprises the steps: receiving a first digital signature request of a signature end; Decrypting the first ciphertext authentication information by using the second private key to obtain first intermediate authentication information; Decrypting the first intermediateauthentication information by utilizing the first public key to obtain a first message abstract of the signature end, and sending a first response message which is successfully decrypted to the signature end; Decrypting the first intermediate authentication information by utilizing the first public key to obtain a first message abstract of the signature end, and sending a first response message which is successfully decrypted to the signature end; Decrypting the encrypted first plaintext authentication information by using the first shared key to obtain first plaintext authentication information; Judging whether the first message digest is the same as the second message digest or not; And when the first message digest is the same as the second message digest, determining that the signature is successful. According to the method, confirmation is performed after identity authentication is successful, so that the safety of authentication information is ensured, and the digital signatureefficiency is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a digital signature method and device. Background technique [0002] In computer communication, when the receiver receives a message, it is often necessary to verify whether the message has been tampered with during transmission, and sometimes the receiver also needs to confirm the identity of the sender of the message, all of which can be achieved through digital signatures. Digital signatures can be used to verify that a message was indeed signed by the sender, and when digital signatures are used to store data or programs, they can be used to verify the integrity of data or programs. [0003] Among them, the patent document with the Chinese Patent Publication No. CN108737323A discloses a digital signature method, device and system, including: the sender obtains a shared quantum key, which is the quantum key shared by the sender and the signature server ; The sender use...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a digital signature method and device to solve the problem of low efficiency of digital signature

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