A Credible Anti-spam Grid System And Implementation

With the rapid development of internet, Email is widely used as an important communion method. However, the occurrence of more and more spam emails is annoying to user, how to solve it become a tough problem.A kind of credible AntiSpam grid architecture is proposed in this article. The AntiSpam Client that voluntarily joins AntiSpam grid virtual organization with specific subject produces a mail's Hash value through the Nilsimsa algorithm, Virtual organization agent node computes and updates the mail number which has the same Hash value-CopyRank. The CopyRank value is larger, the possibility as a junk mail is bigger, more nodes to participate, more precise of the system. Dynamic join and withdrawal will bring smaller undulation to the networkBased on the theory proposed above, this paper realizes an anti-spam grid system prototype, which includes mail proxy server module, anti-spam client and spam recognition module based on chord. The proxy server is responsiable for receiving mails which sended by clients, which evenly delivers these mails to all anti-spam nodes. Anti-spam node is responsible for mail pretreatment, and then hashes the mail main body which is the result of the mail pretreatment. The hash result then is delivered to chord, if the copyrank is larger than spam threshold value, the mail is a spam, the result then is transimited to the anti-spam node, anti-spam node will send the mail to proxy server after plusing the spam label to the mail, proxy server decides to abandon it or send to the transimition server.