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Intrusion Detection Systems: Technologies, Weaknesses and Trends

Traditionally, firewalls and access control have been the most important components used in order to secure servers, hosts and computer networks. Today, intrusion detection systems (IDSs) are gaining attention and the usage of these systems is increasing. This thesis covers commercial IDSs and the future direction of these systems.

Study of steganographic techniques for digital images

Steganography, meaning hidden writing, is the technique of concealing secret information into another cover-media, such as audio, video, image and text, in such a manner that the very existence of the information is camouflaged. Unlike the goal of cryptography, which prevents the data from illicit access and modification by transforming the secret data into messy and meaningless bit-streams, the aim of steganography is to conceal their very existence such that the embedded data is inaudible or invisible to the grabbers.

Web Document Analysis and its Application to Anti-phishing

The Web is evolving at an incredible speed and it is now the largest information and knowledge database. Numerous web documents are gathered, which need programmed processing and examination for smart applications. In this dissertation, we investigate the web document analysis approach and also create an application to anti-phishing. For Web document analysis, a visual factor based page segmentation approach is suggested and implemented.