垃圾邮件的识别和过滤方法.docx

垃圾邮件识别和过滤的方法谈兆年北京理工大学计算机学，北京 100081(1120131743@)Methods for Identifying and Filtering Junk Mail or Spam Tan Zhaonian (ClassSchool of Computer Science, Beijing Institute of Technology, Beijing 100081) Abstract Identifying and Filtering Spam is an important research subject in computer network. In this thesis, I have studied the history of spam filtering technology, which mainly includes the first generation of rule-based filtering technology, the second generation of content-based filtering technology and the third generation of behavior-based filtering technology. 1. Rule-based filtering includes IP address based filtering, mail header based filtering. 2. Content-based filtering includes Bayesian filtering, Memory-based method, decision tree, Boosting method, Support Vector Machine (SVM), etc. 3. Behavior-based filtering includes Email data stream based filtering, mail header based filtering, sender reputation based filtering, mail fingerprint based filtering, behavioral characteristics weighted based filtering, etc. The spammers’ common spurious methods are summarized. Through the reference to large amount of anti-spam documents and data from home and broad, an analysis is made on existing anti-spam techniques and in particular the content-based spam filtering methods. Key words spam filtering; rule; content; text categorization; Na?ve Bayes; behavior 摘要 垃圾邮件识别和过滤是计算机网络领域的一个重要研究课题。垃圾邮件识别和过滤目前已经发展出了三代技术，第一代过滤技术是基于规则的，例如：基于IP地址、基于邮件头的过滤技术。第二代过滤技术是基于内容的，例如：贝叶斯分类算法、Memory-Based方法、决策树、Boosting方法、支持向量机等方法。第三代过滤技术是基于行为的，例如：基于邮件数据流、基于邮件头信息、基于发送方信誉、基于邮件指纹、基于行为特征加权的决策树等过滤方法。本文归纳总结了当前垃圾邮件发送者经常采用的欺骗手段和方法，并参阅国内外大量反垃圾邮件文献和数据，对已有的垃圾邮件技术作出分析和总结，尤其是对基于内容的垃圾邮件过滤方法进行了研究。关键词 垃圾邮件过滤；规则；内容；文本分类；简单贝叶斯；行为随着互联网的发展，垃圾邮件常常让人头痛不已，必威体育精装版报告称美国为垃圾邮件第一大国，中国排名第三（图1）[1]。垃圾邮件问题如今已经成为一个社会热点，近些年来，研究人员们提出了很多垃圾邮件识别和过滤的方法。这些方法的发展经历了三代，第一代过滤技术是基于规则的，例如：基于IP地址、基于邮件头的过滤技术。第二代过滤技术是基于内容的，例如：贝叶斯分类算法、Memory-Based方法、决策树、Boosting方法、支持向量机等方法。第三代过滤技术是基于行为的，例如：基于邮件数据流、基于邮件头信息、基于发送方信誉、基于邮件指纹、基于行为特征加权