Mail encryption method

• Main Authors: TANG RONGXI, YE DAN
• Format: Patent
• Language: English
• Published: 25.03.2015
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention provides a mail encryption method comprising the following steps: a client side requests a recipient public key from a user manage server and a secret key manage server; determines whether the recipient exists or not; the client side obtains the recipient public key from the secret key manage server; use the recipient public key to encrypt and sign main data, and send the encrypted main to a main manage server; the client side obtains ID information of the recipient; determine whether the recipient passes ID verification or not, is not, go back to step 5, and if yes, the client side simultaneously obtains a disposable secret key and the encrypted receiving secret key of the recipient; the client side uses the disposable secret key to decode the receiving secret key, and uses the receiving secret key to decode the mail. An effective ID of a digital certificate is hard to determine to be true or not in main data encryption, the main encryption method of the invention can effectively solve the problems.