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Wireless Network Security
Sedlák, Břetislav ; Krajsa, Ondřej (referee) ; Lambertová, Petra (advisor)
Master thesis focuses on wireless network security. The thesis is divided in two parts. First part describes today’s used standards and their components, topology and security methods as stealth SSID, MAC addresses filtration, WEP, WPA and WPA2. The last three methods are described in detail. In second part there are realized attacks on above described methods of security. There are described attacks on WEP as KoreK chopchop attack, fragment attack, attack FMS, KoreK and attack PTW. Then is described the dictionary attack on passphrase by WPA/WPA2 with PreShared Key authentication obtaining, precomputed hash tables for faster passphrase finding and for using more core procesors during dictionary browsing. The last attack describes obtaining of keystream used for encrypting of frames by WPATKIP and then sending custom data to client. It is described how to carry out each attack and how to protect against them.
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Attacks on Standard 802.11
Burian, Vojtěch ; Horváth, Tomáš (referee) ; Novotný, Bohumil (advisor)
Thesis is concerned about standard 802.11 especially wireless network security in historical and in current way. First part is focused on WEP secured wireless network problematics. Consequently, in different point of view we are focused on network security which was developed recently, for example WPA and WPA2 security. It will be marked the basic functioning and brief overview of standard 802.11, introduction to the known attacks on wireless network security and also indicate the main mistakes. Many older devices have only WEP security. Therefore, in this thesis is designed better and more coherent system of security of the WEP protocol. As well modern methods of security WPA and WPA2 are included. Second part is focused on the simulation of attack on security networks. In this part the problematic with beaking security WEP, WPA and WPA2 is discussed.
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Vliv zátky na zrání vín
Fojtík, Petr
This thesis is focused on assessing the impact of different type of closure for wine aging. Theoretical part describes and characterizes the most common types of closure which are currently used for bottling of wines intended for further aging in the bottle. Characterized kinds of closure are also commonly available on the market and useable in the winery practice. In term of their use, the paper describes their advantages and disadvantages. Within the literary section also provides a description of the factors influence and impact on the aging of wine. The practical part describes the methodology of the measurement method and analytical determination of the amount of free and total sulfur dioxide in wine. Wine samples are evaluated, which was closed a total of nine different type of closures and this closures are describe in the theoretical part. Then there is also the methodology used and the method of sensory evaluation of wines according OIV hundred-point scale and method of evaluation of the structure and substance of wine. The measured and the results are evaluated and selected the optimal type of closure suitable for further aging of the wine in the bottle.
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Design nábytku pro veřejný prostor
Ivanyk, Mariana
The diploma thesis focuses on the design of furniture for a public space, specifically the design bar stool, which has an interesting design and functional solutions using unusual material. In the first part of the thesis deals with the history and the gradual development of furniture design. More describe contemporary furniture and novelties brought about the development of technology. This part deals with the furniture of public space and the associated anthropometry, ergonomics and other requirements and standards. Are compared bar stools, which are currently offered as standard. Finally, I describe the current design and represent here present designers who come up with new features or use of new materials. More important part is the proposal barstools. There is shown a gradual development from initial design ideas, sketches, 3D models to visualization examples of use chairs in a variety of interiors. It describes the materials and methods for their manufacture and preparation. The last part is focused on the production technology described and represented companies that cooperated in the production of bar stool. Finally shows photographs of the finished product.
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Organoleptické defekty vína pochádzajúce z korku
Hanúsek, Martin
This Bachelor thesis deals with the topic of cork taint varifying that the compound which causes the contamination of cork most often and consecutively of wine is 2,4,6-Trichloroanisole. It clarifies the causes of the contamination of cork in connection with the use of chlorine based products. Discussed is also the possibility of contamination due to the wine storage facilities. The thesis further includes a description of the gas chromatography method, whereby the chemicals defecting the cork are detected. Last but not least, it describes the different types of closures on the basis of their material composition and physicochemical properties, and compares their sensory impact on the wine.
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Attacks on Standard 802.11
Burian, Vojtěch ; Horváth, Tomáš (referee) ; Novotný, Bohumil (advisor)
Thesis is concerned about standard 802.11 especially wireless network security in historical and in current way. First part is focused on WEP secured wireless network problematics. Consequently, in different point of view we are focused on network security which was developed recently, for example WPA and WPA2 security. It will be marked the basic functioning and brief overview of standard 802.11, introduction to the known attacks on wireless network security and also indicate the main mistakes. Many older devices have only WEP security. Therefore, in this thesis is designed better and more coherent system of security of the WEP protocol. As well modern methods of security WPA and WPA2 are included. Second part is focused on the simulation of attack on security networks. In this part the problematic with beaking security WEP, WPA and WPA2 is discussed.
|
|
|
Wireless Network Security
Sedlák, Břetislav ; Krajsa, Ondřej (referee) ; Lambertová, Petra (advisor)
Master thesis focuses on wireless network security. The thesis is divided in two parts. First part describes today’s used standards and their components, topology and security methods as stealth SSID, MAC addresses filtration, WEP, WPA and WPA2. The last three methods are described in detail. In second part there are realized attacks on above described methods of security. There are described attacks on WEP as KoreK chopchop attack, fragment attack, attack FMS, KoreK and attack PTW. Then is described the dictionary attack on passphrase by WPA/WPA2 with PreShared Key authentication obtaining, precomputed hash tables for faster passphrase finding and for using more core procesors during dictionary browsing. The last attack describes obtaining of keystream used for encrypting of frames by WPATKIP and then sending custom data to client. It is described how to carry out each attack and how to protect against them.
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