Safe mail system based on USBKEY (Universal Serial Bus Key) and mail encrypting-decrypting method

Abstract

The invention discloses a safe mail system based on a USBKEY (Universal Serial Bus Key) and a mail encrypting-decrypting method. The system mainly comprises a first mail system, a second mail system, a mail encrypting system and a mail decrypting system. When logging in the mail system, a user is required to insert a USBKEY disc (including a private key certificate) and input the password of a certificate, besides inputting the password of an account; and if the input password is wrong, the user is refused to log in the system. When a mail is transmitted, a COM (Component Object Model) assembly calls a private key in the USBKEY disc to generate a Hash value, the mail is signed up by using the Hash value, and a public key of an addressee is called to encrypt the mail; and when the mail is looked up, the private key in the USBKEY disc is required to be called to decrypt a key to generate a Hash value by a browser COM assembly after the key of the addressee is obtained, the mail is decrypted and the signature of the mail is checked by using the Hash value, therefore, the mail is safer in the transmitting process, and the authenticity of the mail is also ensured.

Description

technical field [0001] The invention relates to Internet communication security technology, in particular to a USBKEY-based secure mail system and mail encryption and decryption methods. Background technique [0002] With the continuous development and expansion of the Internet, e-mail has also developed and touched daily life and work. However, the openness, universality and anonymity of the Internet have also brought many security risks to internal and external e-mails. The accompanying security issues are also getting more and more attention. E-mails fly around the Internet like postcards, and personal privacy and company secrets are at risk of being intercepted and browsed at any time. [0003] A commonly used mail transfer protocol, such as Simple Mail Transfer Protocol (SMTP, Simple Mail Transfer Protocol), is a relatively simple text-based protocol. One or more recipients (in most cases confirmed to exist) on which to specify a message, and the message text will be t...

AI Technical Summary

Problems solved by technology

[0008] However, due to the characteristics of the RSA public key encryption system itself, the slow operation speed has always been its biggest shortcoming, so it can only be applied to the occasion of encrypting a small amount of data, not suitable for mail communication occasions containing a large amount of data

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