Identification-based digital signature method and device

Abstract

The present invention discloses an identification-based digital signature method and device, wherein the method includes: the signature terminal obtains the identification private key T corresponding to the identification ID of the signature terminal generated by the key generation center, wherein the key generation center randomly generates the signature public-private key For the identification cryptographic system parameter P and the master key ms, the key generation center executes the digital signature method MA to digitally sign the identification ID, generates a pre-signature Π and a signature value (R, S) containing two parts, and converts the pre-signature Π And the second part of the signature value S is used as the identification private key T=(Π, S); using S in the identification private key T as the signature private key to execute the digital signature method MB based on the discrete logarithm problem to sign the message M. The digital signature method and device of the present invention firstly signs the identification ID of the signing end to form the identification private key T, and then uses the identification private key T to sign the message M to be signed, and the operation is simple and safe.

Description

technical field [0001] The invention relates to the field of digital signatures, in particular to an identification-based digital signature method and device. Background technique [0002] The identity encryption algorithm uses the user's identity and the public information of the system to calculate the user's identity public key, and the communication between users does not need to exchange certificates or public keys. The obvious advantage of this type of system is that it is easy to manage, but most identification cryptographic algorithms are constructed using bilinear pairings. Due to the complexity of bilinear pairing operations, this type of algorithm faces challenges in executing on some embedded devices with very low computing power. . Contents of the invention [0003] The main purpose of the present invention is to provide an identification-based digital signature method and device with simple operation. [0004] In order to achieve the purpose of the above in...

AI Technical Summary

Problems solved by technology

The obvious advantage of this type of system is that it is easy to manage, but most identification cryptographic algorithms are constructed using bilinear pairings. Due to the complexity of bilinear pairing operations, this type of algorithm faces challenges in executing on some embedded devices with very low computing power.

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