| 摘要 |
<p>A system and method for preventing Spam by using pay-charge-contribution and authentication means, adopting a method of a sender pays a addressee for the sent E-mail, and authenticates the E-mail server by using digital certificate, encrypts the sent E-mail by private key of the server's own digital certificate, then decrypts the E-mail by public key of the digital certificate, thereby authenticating whether the sending server is right of not, and it could prevent the E-mail from the imitated identity.</p> |
