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Identifier 000368402
Title Detecting and Defending Against Fraud in the Underground Economy
Alternative Title Ανίχνευση και αντιμετώπιση περιστατικών απάτης στην παραοικονομία
Author Ζάρρας, Απόστολος Νικόλαος
Thesis advisor Μαρκάτος, Ευάγγελος
Abstract Online advertisements (ads) provide a powerful mechanism for advertisers to effectively target web users. These ads can be customized based on a user's browsing behavior, geographic location, and personal interests. There is currently a multi-billion dollar market for online advertising, which generates the primary revenue for some of the most popular web sites on the Internet. In order to meet the immense market demand, and to manage the complex relationships between advertisers and publishers (i.e., the web site hosting an ad), marketplaces known as ad exchanges are employed. These exchanges allow publishers (sellers of ad space) and advertisers (buyers of this ad space) to dynamically broker traffic through ad networks to efficiently maximize profits for all parties. Unfortunately, the complexities of these systems invite a considerable amount of abuse from cybercriminals, who profit at the expense of the advertisers. In this thesis, we present a detailed view of how one of the largest ad exchanges operates and the security issues that it encounters from the vantage point of a member ad network. More specifically, we analyzed a dataset containing transactions for ingress and egress ad traffic from this ad network. In addition, we examined information collected from a command-and-control server used to operate a botnet that is leveraged to perpetrate ad fraud against the same ad exchange.
Language English
Subject Botnets
Click-fraud
Issue date 2011-07-15
Collection   School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses
  Type of Work--Post-graduate theses
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