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Analysis of email spam sources
Caha, Tomáš ; Kubánková, Anna (referee) ; Komosný, Dan (advisor)
The first part of this thesis deals with an approach of designing and developing of application for IP geolocation using various geolocation databases. Methods of geographical location of network devices and amount of available data provided by chosen commercial and freely accessible geolocation databases are presented. The data are summarized with focus on methods of obtaining information about IP addresses from various databases. In the paper there are also presented ways used to develop the Python application and its parts, which can be easily reused in other programs. The command line program was created to demonstrate that all parts of the developed application work properly. The whole application is freely accesible under the conditions of the MIT license, published on GitHub (https://github.com/tomas-net/ip2geotools/) and in the Python package index PyPi. The second part of this thesis deals with the description of cyberthreats and the use of developed application to mass geolocation of IP addresses that are listed in chosen freely accessible lists as sources of email spam or cyberattacks. Geographical analysis of cyberattacks sources shows countries of origin. Results of analysis are presented in graphs and maps.
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Spam Filter Implementation on the Basis of Artificial Immune Systems
Neuwirth, David ; Schwarz, Josef (referee) ; Sekanina, Lukáš (advisor)
Unsolicited e-mails generally present a major problem within the e-mail communication nowadays. There exist several methods that can detect spam and distinguish it from the requested messages. The theoretical part of the masters thesis introduces the ways of detecting unsolicited messages by using artificial immune systems. It presents and subsequently analyses several methods of the artificial immune systems that can assist in the fight against spam. The practical part of the masters thesis deals with the implementation of a spam filter on the basis of the artificial immune systems. The project ends with comparison of effectiveness of the newly designed spam filter and the one which uses common methods for spam detection.
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Analysis of email spam sources
Caha, Tomáš ; Kubánková, Anna (referee) ; Komosný, Dan (advisor)
The first part of this thesis deals with an approach of designing and developing of application for IP geolocation using various geolocation databases. Methods of geographical location of network devices and amount of available data provided by chosen commercial and freely accessible geolocation databases are presented. The data are summarized with focus on methods of obtaining information about IP addresses from various databases. In the paper there are also presented ways used to develop the Python application and its parts, which can be easily reused in other programs. The command line program was created to demonstrate that all parts of the developed application work properly. The whole application is freely accesible under the conditions of the MIT license, published on GitHub (https://github.com/tomas-net/ip2geotools/) and in the Python package index PyPi. The second part of this thesis deals with the description of cyberthreats and the use of developed application to mass geolocation of IP addresses that are listed in chosen freely accessible lists as sources of email spam or cyberattacks. Geographical analysis of cyberattacks sources shows countries of origin. Results of analysis are presented in graphs and maps.
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Spam Filter Implementation on the Basis of Artificial Immune Systems
Neuwirth, David ; Schwarz, Josef (referee) ; Sekanina, Lukáš (advisor)
Unsolicited e-mails generally present a major problem within the e-mail communication nowadays. There exist several methods that can detect spam and distinguish it from the requested messages. The theoretical part of the masters thesis introduces the ways of detecting unsolicited messages by using artificial immune systems. It presents and subsequently analyses several methods of the artificial immune systems that can assist in the fight against spam. The practical part of the masters thesis deals with the implementation of a spam filter on the basis of the artificial immune systems. The project ends with comparison of effectiveness of the newly designed spam filter and the one which uses common methods for spam detection.
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Spam, abuse of email and options of protecion
Daněk, Tomáš ; Luc, Ladislav (advisor) ; Petera, Martin (referee)
The thesis deals with unsolicited mail known as spam. Its main goal is to present the most widely used current methods of protection against spam and their practical application to achieve the highest possible efficiency. This study aims to find the optimal combination of protection for regular electronic mailbox. In the first part is discussed the history, reasons for the emergence and expansion of mass spam. Furthermore are introduced different types of spam, which differ with their purpose and also their dangerousness. At the end of the first part are presented global statistics for the year 2009, along with estimated total annual cost devoted to fighting spam. Mentioned are the current trends and possible future development of spam. In the second part are presented in detail various widely used methods of protection which vary in principles of operation. Their common goal is reducing the number of spam messages received to the minimum. Also their advantages, disadvantages and pitfalls of their use are analyzed. At the end of the thesis is presented a practical application of those mentioned protections in a particular case. The main contribution of the work should be limitation of received spam to a minimum and reduction of the risks associated with it based on knowledge of techniques and practices used by spammers.
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Principy používané u e-mailových antispamových ochran
Šebek, Michal ; Kastl, Jan (advisor) ; Tlustý, Zdeněk (referee)
Diplomová práce se zabývá nevyžádanými e-mailovými dopisy neboli spamem. V práci jsou popsány základy komunikace využívané u elektronické pošty a de?nice spamu. V práci jsou shrnuty druhy spamů a možnosti, jak se nevyžádaným zpravám bránit, a to jak na straně odesílatele, tak na straně příjemce. Naznačeny jsou také postupy, jakými lze tyto obrany obejít. V praktické části je pak ukázáno, jak lze postupy pro obelstění antispamových ?ltrů využít.
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