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Study and Implementation of Spam Filtering Technologies Based on Rules

Author: YinChun
Tutor: FangYong
School: Sichuan University
Course: Communication and Information System
Keywords: Spam Mathematical description Content Filtering Black / White list E-mail protocol
CLC: TP393.098
Type: Master's thesis
Year: 2004
Downloads: 267
Quote: 3
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Abstract


With the increasing popularity of the Internet, e-mail is becoming one of the most efficient and most economical means of communication. However, when the user receives the message at the same time useful, a variety of spam, mail bombs and unsolicited e-mail viruses, etc. are not overwhelmed by the user's mailbox, enabling users to have to spend a lot of time and energy to deal with These spam. Moreover, these junk e-mail on the Internet day and night caused a large number of transmission congestion mail servers, reducing the efficiency of the entire network, mail service providers to bring a great loss. So, how accurate from a large number of messages required to find a useful message, reduce spam interference has become both the e-mail provider or ordinary users are the focus of concern. Therefore, research and development of spam filtering system becomes extremely urgent. Articles in the e-mail protocol on the basis of in-depth analysis, first discussed the major spam filtering technologies, including: content filtering technology, black / white list technologies and SMTP authentication techniques. Article on the advantages and disadvantages of various technologies are described, and spam filtering technology with a summary. Then explore the mathematical description of spam, which is the key part of this article. First discusses the mathematical basis of the description, including: spam sending mechanism, spam processing point of view - \describes the theoretical basis. Then Based on the study of existing definitions of organizations and government departments on the basis of spam, gives his own definition and classification of spam. The definition of spam is the next step for spam judgments basis and foundation. Finally, the mathematical description, respectively, of the message header, subject and body of the letter, and the letter of the mathematical description of the attachment. On the basis of the mathematical description, followed by a discussion of the anti-spam rules based on multi-system and its implementation. The system uses content filtering and black / white list filtering technology combined will ultimately judged as an e-mail: legitimate mail, spam and suspected spam messages in one of three categories. Sichuanese master's degree thesis sounds of spring: rule-based multi-spam technology research through consultation and implementation has been achieved given the detailed design of the system is given interface and flow chart of each module, and finally put forward anti-spam system, auxiliary systems - dynamic blacklist, and the system test results. Innovation of this paper lies in the characteristics of spam headers, message body characteristics and other characteristics were studied using mathematical methods, and gives the mathematical description of spam characteristics, that gives the judge a mathematical method of spam . It is worth mentioning that the reason for this e-mail message body characteristics of the mathematical description of the letter into the body (including subject information) and letters in view of the vast majority of two parts, accessories spam without attachment, then use spam math feature described, the vast majority of cases do not consider the mail attachments. Visible features of the e-mail message body part of the study is divided into two logically easier to understand. Keywords: mathematical description of content filtering spam black / white list e-mail protocol

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > The application of computer network > E-mail ( E -mail )
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