Member Login

E-mail:    Password:  




 TitleDate AddedCompany
whitepaper Emerging Trends in Fighting Spam26/03/08 Symantec
  Spam has been a serious problem for email administrators and users alike for more than five years, growing from one in six emails in 2002 to approximately three out of four emails today. This white paper focuses on the problems caused by image spam, as well as other spammer techniques for delivering content through existing spam-blocking defenses. The paper also discusses Symantec’s approach to solving the problem of image spam, botnets and other threats.  sponsored by
whitepaper Stopping Spam by Extrusion Detection2009-01-01 University of Cambridge
  End users are often unaware that their systems have been compromised and are being used to send bulk unsolicited email (spam). This paper shows how automated processing of the email logs recorded on the "Smarthost" provided by an ISP for their customer's outgoing email can be used to detect this spam. The variability and obfuscation being employed by the spammers to avoid detection at the destination creates distinctive patterns that allow legitimate email traffic to be distinguished from spam at the source. Some relatively simple heuristics result in the detection of low numbers of "False positives" despite tuning to ensure few "False negatives".

Tags: Internet and Web, Intrusion - Tampering		   
whitepaper Propagating Trust and Distrust to Demote Web Spam2009-01-01 Lehigh University
  Web spamming describes behavior that attempts to deceive search engine's ranking algorithms. TrustRank is a recent algorithm that can combat web spam by propagating trust among web pages. However, TrustRank propagates trust among web pages based on the number of outgoing links, which is also how PageRank propagates authority scores among Web pages. This type of propagation may be suited for propagating authority, but it is not optimal for calculating trust scores for demoting spam sites. This paper proposes several alternative methods to propagate trust on the web. With experiments on a real web data set, they show that these methods can greatly decrease the number of web spam sites within the top portion of the trust ranking.

Tags: Intrusion - Tampering, Intrusion - Tampering		   
whitepaper Memory Management of Density-Based Spam Detector2009-01-01 University of Tsukuba
  The volume of mass unsolicited electronic mail, often known as spam, has recently increased enormously and has become a serious threat to not only the Internet but also to society. A new spam detection method which uses document space density information has been proposed. Although the proposed method requires extensive e-mail traffic to acquire the necessary information, it can achieve perfect detection (i.e., both recall and precision is 100%) under practical conditions. This paper describes the memory management mechanism of this new spam detection method. Although the "Least Recently Used" strategy is the standard memory management strategy, they show that the use of the direct-mapped cache can be used as a substitute for the LRU cache, and "Retaining Multiply Accessed Entries" strategy can further improve the memory management performance and improve the theoretical recall rate for spam detection.

Tags: Internet and Web, Intrusion - Tampering		   
whitepaper A Differentiated Message Delivery Architecture to Control Spam2009-01-01 Florida State University
  Unsolicited bulk electronic mail (spam) is increasingly plaguing the Internet Email system and deteriorating its value as a convenient communication tools. This paper argues that the difficulties in controlling spam can be attributed to the lack of receiver control on how different Email messages should be delivered on the Internet. In the current Email delivery architecture, a user can send messages to another at will, regardless of whether or not the latter is willing to accept the message. Based on this observation, they propose a differentiated message delivery architecture-DiffMail. In DiffMail, a user can classify Email senders into multiple classes and handle messages from each class differently.

Tags: Internet and Web, Intrusion - Tampering		   
whitepaper An Open Digest-Based Technique for Spam Detection2009-01-01 Universita degli Studi di Milano
  A promising anti-spam technique consists in collecting users opinions that given email messages are spam and using this collective judgment to block message propagation to other users. To be effective, this strategy requires a way to identify similarity among email messages, even if the program used by the spammer to generate the messages may try to obfuscate their common origin. This paper investigates the issues arising in the design of a digest-based spam detection mechanism, which has to satisfy many conflicting requirements: protect message confidentiality, be public, and prove difficult or expensive to fool by obfuscation techniques that automatically introduce differences into the same base spam message. They show that an open digest function is able to satisfy the above requirements and contribute to the fight against spam.

Tags: Security Administration, Intrusion - Tampering		   
whitepaper Distributed Quota Enforcement for Spam Control2009-01-01 Massachusetts Institute of Technology
  Spam, by overwhelming inboxes, has made email a less reliable medium than it was just a few years ago. Spam filters are undeniably useful but unfortunately can flag non-spam as spam. To restore email's reliability, a recent spam control approach grants quotas of stamps to senders and has the receiver communicate with a well-known quota enforcer to verify that the stamp on the email is fresh and to cancel the stamp to prevent reuse. The literature has several proposals based on this general idea but no complete system design and implementation that: scales to today's email load, imposes minimal trust assumptions, resists attack, and upholds today's email privacy. This paper describes the design, implementation, analysis, and experimental evaluation of DQE, a spam control system that meets these challenges.

Tags: Security Administration, Intrusion - Tampering		   
whitepaper Using Semantic Analysis to Classify Search Engine Spam2009-01-01 Stanford University
  Due to the similarities between spam and non-spam their original semantic analyzers are not an effective method to classify spam content. Since spam and non-spam documents are so similar, it is sometimes very difficult for a human to differentiate between the two. Because of these similarities, it is unlikely that any natural language analysis method will be successful in differentiating between spam and non-spam. However, using semantic analyzers to determine the usefulness of information on a webpage had much more promising results. Assuming the user is more interested in finding a quick answer to their query, a page with more textual information should have a higher rank. Their analyzers could help to determine this rank.

Tags: Security Administration, Intrusion - Tampering		   
whitepaper Throttling Outgoing SPAM for Webmail Services2009-01-01 University of Georgia
  Spam has become a serious problem of Internet, and the current defense is limited to the filters deployed at the recipient side. Little known research has been applied to reduce the volume of spam messages being generated. This paper presents a system that dynamically throttles emails based on the message content at the Email Server Provider (ESP) side. The goal of this system is to reduce the spam generated by the ESP while not introducing long delay to legitimate messages. This goal is achieved by applying spam filters during the email delivery time and by using filter scores to control the throttling effect. The throttling effect is implemented through a computational puzzle system.

Tags: Security Administration, Intrusion - Tampering		   
whitepaper Top Ten Tips to Improve Email Security Infrastructure2009-01-01 MessageLabs, now part of Symantec
  Every organization must maintain robust email security defenses, but it is getting harder as the spam volumes are increasing, malware is becoming stealthier, and developers of malicious content are developing new and more effective ways to circumvent email security defenses. New threat vectors, including Web 2.0 applications and social networking tools, are adding to this security challenge. Plus, the consequences of malware are getting worse: your sensitive corporate data could be lost and your business severely compromised. Download this white paper for ten tips you can apply to protect your business infrastructure today.

Tags: Security Administration, Security Administration, Internet and Web, Intrusion - Tampering		   
whitepaper Underground Economy Report2009-01-01 MessageLabs, now part of Symantec
  This survey of cybercrime activity in the underground economy includes a discussion of some of the more notable groups involved, as well as an examination of some of the major advertisers and the most popular goods and services available. It also includes an overview of the servers and channels that have been identified as hosts for trading, and a snapshot of software piracy using a file-sharing protocol in the public domain. This report is meant to be an analysis of certain aspects of the underground economy and is not meant to encompass a survey of Internet cybercrime as a whole. Download this report in its entirety to learn more.

Tags: Security Administration, Security Administration, Intrusion - Tampering, Security Administration