A method and system for sending and receiving e-mail based on post-quantum and identity identification

Abstract

The invention discloses an e-mail sending and receiving method and system based on post-quantum and identity identification, belonging to the technical field of secure communication. In the system, KGC receives the identity identification sent by the user, generates a private key and returns the private key to the user; the sending direction KGC sends the ID to obtain the sender's private key, signs and encrypts the plaintext of the mail, and sends the ciphertext of the mail to the sender's mail server; the sender's mail server receives the mail ciphertext and delivers it to the receiver's mail server; the receiver's mail The server receives and saves the ciphertext of the mail; the receiving party sends the identity identifier to KGC and obtains the recipient's private key, receives the ciphertext of the mail from the recipient's mail server and decrypts it and verifies the signature. The cryptographic system based on the identity mark avoids the disadvantages of complex public key acquisition methods and multiple authentication certificates; at the same time, it combines the post-quantum cryptographic algorithm, which can effectively resist quantum computing attacks and realize post-quantum secure communication.

Description

technical field [0001] The invention belongs to the technical field of secure communication, and more specifically relates to a method and system for sending and receiving emails based on post-quantum and identity identification. Background technique [0002] As an indispensable communication software in the process of informatization, the e-mail system has the characteristics of asynchrony, versatility, and convenient use, making it widely used in individual users or business units. However, with the increasing abundance of attack methods such as phishing, attackers can obtain a large amount of important data and information by stealing permissions, causing users and enterprises to suffer huge economic losses. [0003] In the existing mail system, users send mail using Simple Mail Transfer Protocol (SMTP) communication, and receiving mail uses Post Office Protocol Version 3 (POP3) or Internet Message Access Protocol (IMAP) communication. Because the SMTP protocol, POP3 pro...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method and system for sending and receiving e-mails based on post-quantum and identity identification. post-quantum security; use anti-quantum attack encryption algorithms and signature schemes to ensure the communication security of emails during transmission, and use identity-based cryptographic systems to avoid complex public key distribution and verification processes in public key infrastructure. This solves the technical problems that the existing mail system cannot resist quantum attacks and the system structure is complex

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