Generalized signcryption method based on coding

Abstract

The invention discloses a generalized signcryption method based on coding. The generalized signcryption method comprises the following steps: 1) setting public parameters; 2) generating a public key and a private key for a registered user; 3) defining a distinguishing function, and judging the existence condition of the public key of the user; (4) carrying out signcryption operation on the transmission information, that is, the public key of the receiver is firstly used for encryption, and then the private key of the sender is used for signature; 5) carrying out unsigncryption operation on thesigncryption text, that is to say, decryption is performed by using a private key of a receiver, signature verification is carried out by using the public key of the sender to complete code-based generalized signcryption. According to the method, the conversion among encryption, signature and signcryption functions can be realized according to the existence of the public key by the users of the transmitting party and the receiving party, so that the generalized signcryption function of quantum computing resistance is realized, meanwhile, the key storage amount can be reduced, and the securityis relatively high.

Description

technical field [0001] The invention belongs to the field of network information security and relates to a coding-based generalized signcryption method. Background technique [0002] Signcryption technology can complete the encryption and authentication functions in one logical step. Compared with the traditional method of "encrypting" and then "signing" or "signing" and then "encrypting", it can consume less resources and is easy to operate. . Although the signcryption method has the function of encryption and signature, the signcryption method, the encryption method and the signature method are still different or even mutually exclusive, because the signcryption method requires both the sender and the receiver to have a key, while the encryption method only The receiver is required to have a key, and the signature method only requires the sender to have a key, and the three cannot be converted to each other. The generalized signcryption method realizes the adaptive conve...

AI Technical Summary

Problems solved by technology

Although the generalized signcryption method has relatively good functions, with the rapid development of quantum technology today, the traditional public key cryptography method will no longer be safe and reliable, which will not only cause the current security method to be no longer safe and based on the traditional public key The same is true for the generalized signcryption method of key cryptography, so how to provide a method for security protection in the quantum era is very necessary

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