Terminal and non-repudiation encrypted signature method and device thereof

Abstract

The invention relates a terminal and a non-repudiation encrypted signature method and device thereof. The method comprises that an encrypted signature end obtains parameters of an identification cipher system of a secret key generating center, and generates a key pair including a public signature key and a private signature key; a message M is encrypted by utilizing an identification ID_B of a decrypted signature verification end, short signature is carried out on encryption result data and the message M by utilizing the private signature key, and encrypted signature result data is generated; and the decrypted signature verification end carries out decrypted signature verification on the encrypted signature result data by utilizing the parameters of the identification cipher system, an identification decrypting private key D_B corresponding to the identification ID_B and the public signature key, and if verification fails, an output null is decrypted. According to the invention, the encrypted signature result data is generated via short signature, an output result of the encrypted signature end is short, verification is simple, and both the data privacy and authenticity can be ensured.

Description

technical field [0001] The invention relates to the field of digital signatures, in particular to a terminal and its non-repudiable encrypted signature method and device. Background technique [0002] In some security applications, the data needs to be encrypted and protected, and at the same time, the authenticity of the identity of the sender of the data must be guaranteed. The general method is to sign the data and then encrypt the data, or encrypt the data first and then sign the data. However, this protection method that performs the complete encryption method and the signature method separately will cause the output result to be the total length of the encryption method output and the signature method output. [0003] A cryptographic signature method with short output length and simple verification method is in demand. Contents of the invention [0004] The main purpose of the present invention is to provide a terminal with short output length and simple verificati...

AI Technical Summary

Problems solved by technology

However, this protection method that performs the complete encryption method and signature method separately will result in the output result being the total length of the encryption method output and the signature method output

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