浅析反垃圾邮件技术

电子邮件是Internet最广泛的应用,但随之而来的是垃圾邮件的泛滥。本文分析了垃圾邮件的产生原因和危害,阐述了垃圾邮件的发送机理,并对当前主要的反垃圾邮件技术进行了介绍。     

2014年第一季度中国反垃圾邮件状况调查报告

首先介绍了2014年第一季度电子邮箱用户使用电子邮箱情况,然后分析了电子邮件的垃圾邮件状况及用户对垃圾邮件的处理方式,最后提出了垃圾邮件问题与治理的新形势.     

Effective scheduling strategies for boosting performance on rule-based spam filtering frameworks

Despite the enormous importance of e-mail to current worldwide communication, the increase of spam deliveries has had a significant adverse effect for all its users. In order to adequately fight spam, both the filtering industry and scientific community have developed and deployed the fastest and most accurate filtering techniques. However, the increasing volume of new incoming messages needing classification together with the lack of adequate support for anti-spam services on the cloud, make filtering efficiency an absolute necessity. In this context, and given the extensive utilization and increasing significance of rule-based filtering frameworks for the anti-spam domain, this work studies and analyses the importance of both existing and novel scheduling strategies to make the most of currently available anti-spam filtering techniques. Results obtained from the experiments demonstrated that some scheduling alternatives resulted in time savings of up to 26% for filtering messages, while maintaining the same classification accuracy.     

基于贝叶斯过滤算法的反垃圾邮件策略

结合传统贝叶斯算法的数学定理．给出了朴素贝叶斯过滤算法以及该算法在反垃圾邮件中的六个处理步骤,算法通过渐进学习的方式分别建立三个哈希表,并预置相应的阀值来判定收到的邮件是否为垃圾邮件．以实例方式说明了此算法为基础的反垃圾邮件策略,最后指出了朴素贝叶斯算法存在的问题及可能改进的方向,对防范和处理垃圾邮件提供理论依据和实践参考．     

反垃圾邮件策略的研究

对垃圾邮件进行鉴别已经成为信息安全技术的重要内容之一。本文对电子邮件所涉及到的关键技术,包括邮件协议、垃圾邮件技术、反垃圾邮件技术进行了探讨。提出Bayes分类的垃圾邮件鉴别方法,并给出了实验结果。     

开放内容空间的Spare页面侦测

基于链接分析自动侦测Spam页面,提出了一个分阶段机制。采用决策树和链接分析模型对Wikipedia中的所有节点进行Indegree和Outdegree检测,从而产生出一个候选列表,并引入一个启发算法来降低第一类型的错误。设计一个分类器用于分类候选列表,采用TrustRank和SpamRank算法分别从信任种子集和Spam种子集中推算系统页面各自可信概率和Spam概率,从而减少第二类型的错误。然后将产生的候选集合推送至页面编辑,根据编辑判断的结果反馈训练模型,调整权重。结果表明,分阶段侦测模型可自动地侦测Spam页面,其查准率和查全率分别达到78．3％和94％。     

反垃圾邮件网关技术的标准进展

随着互联网的高速发展,反垃圾邮件网关已经成为阻止垃圾邮件日益泛滥的有力武器。本文介绍了反垃圾邮件网关的技术现状及其标准的进展情况。     

Spam: One Puzzled Problem for E-Commerce

E-commerce has advantages of low bargaining cost, full field service, and convenient. Its development forms and promotes the key factor of the global economic growth, and the security problem of e-commerce becomes more and more important thereupon. It is the subject of a great meaning to structure the safe, convenient e-commerce running environment. The task of anti-spam is a concrete content among them. This paper discusses the source and danger of spam, and the precautionary and radical cure measures of spam are put forwarded, and the technologies of the anti-spam are discussed especially.     

一种个性化垃圾邮件识别系统的设计

不同的邮件用户可能会对“什么是垃圾邮件”有着不同的个人定义。对此,文中提出了一个基于客户端的个性化垃圾邮件识别系统的设计模型,介绍了其中的几项关键算法,并讨论了对于用户反馈的解决办法。经分析,本系统以用户为中心,便于灵活地识别和过滤垃圾邮件。     

一个基于Naive Bayesian垃圾邮件过滤器的改进

近几年来,垃圾邮件成为互联网的公害之一。现有的反垃圾邮件技术中,基于统计方法的Naive Bayesian分类算法在垃圾邮件过滤中有很好的效果。文中简单介绍了Naive Bayesian分类算法,提出了一种旨在提高垃圾邮件过滤精确率的改进方案,并给出了实验结果。