| Summary: | 碩士 === 實踐大學 === 資訊科技與管理學系碩士班 === 100 === Since the flooding of unsolicited bulk spam mails becomes unavoidable, spam mails not only cause the waste of network bandwidth and the overload of mail server filtering system, but also lead to the recipient taking more time to delete them. According to the statistics of Symantec, about 70.5% of total e-mails are spam. It becomes the disaster of recipient. Moreover, about 77% of spam mails are sent by botnets and most of botnets are infected by malicious code through spam mails.
Recently, the problem of distributed botnets becomes harder to detect and defense. In this project, we propose a set of cloud services to support mail servers and mailers to block spam mails under the attacks. Three major mechanisms are proposed to sender: a challenge response service is used to get a registry key during login stage. Based on the key, a one-time password generation services is used to add into each mail header before sending, such that the receiver can invoke a cloud one-time password verification service to identify this mail directly sent by recipient or not. Once a mail server enabled such services, all its users can be protected by key verification service that all mails without one-time password are possible spam mails required filtering later. Since the failure of verifications can be analyzed in the cloud to make an active possible botnet infected reports to mail servers.
In this paper, we will develop these services on the private cloud environments, To implement this anti-spam services based on the open source Apache’s Hadoop distributed computing architecture. The three major services consists of a challenge response service, a one-time password generation service, and an active reporting service of anti-botnet analyzer in the cloud.
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