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Optical information transmission - transmission security
Kondicz, Dávid ; Čučka, Milan (referee) ; Filka, Miloslav (advisor)
The submitted work deals with issues of optical transmissions and its security. We will become familiar with a variety of transferability of information, based on which we can assess the advantages and disadvantages of each technology as compared to optical information transmission. Based on acquired information we will try to implement interception of optical communication of cable TV provider.
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ZigBee in Building Automation
Liška, Radovan ; Šimek, Milan (referee) ; Honzík, Petr (advisor)
Improvement of wireless technologies is a natural consequence of the progress in the field of science and technology. Usage of wireless networks based on the ZigBee technology, which are capable of indepent operation in present form, providing detailed information about physical environment and process management, brings many advantages. On the other hand, there is a serious issue about commissioning. This Master's Thesis deals with introduction of ZigBee technology and its usage, describes issue about device commissioning and types of commissioning. The main part of the Thesis is my own proposal for solving this problem, proposing algorithm using the Bitcloud stack for Coordinator, End Device and Router and its demonstration at the application. Along with analysing the application there are described possible solutions for creating a new network, adding a new node into the existing network and changing a node. The result is a graphical application and firmware for each device. The result of succesfully associated devices in network is supported by the measurement.
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Security of wireless computer networks
Jelínek, Martin ; Pelka, Tomáš (referee) ; Doležel, Radek (advisor)
The master's thesis deals with the issue of Wireless Local Area Network (WLAN) from the viewpoint of the security and functional principle of security mechanisms. The transition to the issue concerning the security is accompanied by the methods of wireless data transmission operating on the level of physical layer (FHSS, DSSS, OFDM, MIMO), which is followed by the summary of individual 802.11 standards. The next part deals with the issue of shared transmission medium (CSMA/CA), influence of interference and correcting mechanisms (RTS/CTS). Within the security, the principles of the authentication along with the commonly used methods of security (WEP, WPA, WPA2) are described in detail. The first part concerning security deals with the security in the form of the WEP protocol, which is considered insufficient nowadays and points out the imperfect implementation and the consequent risks. The following part describes the security in the form of WPA which eliminates the implementation weaknesses of the previous WEP security protocol. The description of commonly used mechanisms of authentication (PSK, 802.1x), required temporary key management (PTK, GTK), data integrity (MIC) and encryption which uses TKIP protocol are also included. The last part, possible WLAN security, is aimed at the full support of 802.11i standard, which is called WPA2 (sometimes RSN). That part describes the basic encryption security element CCMP, which is based on the AES block cipher modes. The practical part of the thesis deals with the security verification of current wireless networks. In the process of verification the accessible HW means and programming tools of Open Source Software (OSS) are used. By means of verification it has been pointed out that there are possible security risks resulting from the security method which has been used. Also several recommendations how to reduce the security risks of the used method to minimum are mentioned.
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802.11 standard security techniques and their features
Endrle, Pavel ; Pust, Radim (referee) ; Pfeifer, Václav (advisor)
This master´s thesis is about 802.11 standard security techniques and their features. Particular types of this standard and its features are shown in the introduction. Wireless network security cypher alghoritm types, their features, weaknesses and principles of functions are closely described in next few chapters. Realized attacks on these security alghoritms with their principles are described and shown in the practical part of thesis. One chapter is about effectivity, accessibility and practicability valorization of these attacks in practice.
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Warehouse Management Systems (WMS)
Korčián, Stanislav ; Žák, Pavel (referee) ; Bradáč, Zdeněk (advisor)
Goal of this thesis is to describe the warehouse management systems with focus on the engineering solution, software development and innovation. The evolution of warehouse management systems is very similar to that of many other software solutions. Initially a system to control movement and storage of materials within a warehouse, the role of WMS is expanding to including light manufacturing, transportation management, order management, and complete accounting systems. General point of view of this thesis is suggest the method how to implement modular (standard) solution on the premises. Project is specialized on PDA terminals and wireless access points settings. Introductory chapter of thesis offer extensive background, which reach out reader with system SAP and logistics processes. Practical part of project can divided to two parts. First one analyze software and develop system in cooperation with supplier and ITC department of ABB corporation. Follow part describe reports and dynamic programmes in programming language ABAP with a view to adoption architecture of system SAP. In fine author intend about future development of modern technology in ABB corporation and potential development of object identification method.
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Wireless Security and Surveillance System
Výborný, Jiří ; Frýza, Tomáš (referee) ; Prokopec, Jan (advisor)
This Master’s thesis deals with design and construction of a wireless security and surveillance system in ZigBee wireless networks (IEEE802.15.4). The design consists of creating a star network topology with intended monitoring of home area via end device boards paired with coordinator board, which provides basic networking functionality. End device is used to send data from a temperature sensor DS1631 and magnetic reed switches to coordinator. ZigBee module ZDM-A1281-A2 made by MeshNetics company embedded on each board contains a micro controller ATMega1281 and a transceiver AT86RF230 working in a 2,4GHz frequency band. System is able to notice of any door or window move actions and too high temperature. The non-fully functional ZigBee stack, which is called an Open MAC software, based on MAC (Media Access Control ) layer and PHY (Physical) layer from MeshNetics, has been used to develop the user software. Open MAC consists of three application samples in C code. One of them was modified by the user for an application of communication between the module and sensors. The same design with module RC2204AT made by Radiocrafts company was tested as well, but it couldn’t be executed. All developed boards have been constructed and tested via Terminal PC program.
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Expansion concept of provider's wireless network
Petras, Vít ; Pavlíček, Luboš (advisor) ; Matuška, Miroslav (referee)
Nowadays it is very important to have access to internet not only at work but also at home. In large cities there is no problem to provide access to a great percentage of the population but in smaller towns and villages there can be a problem with high speed internet coverage. Metallic lead is expensive, the optic one even more. Here comes the chance for wireless internet providers who are not bound by building expensive infrastructure but by relief only. One of these providers is Eurosignal co-operative that fills the space in the Prague-West area and Mnisek pod Brdy's surroundings. The aim of the bachelor thesis is to analyze the current state of the network, to point to the posibility of extending the existing network and to propose the best solutions of technical implementation of such extention depending on price and new potential clients number in a specific area.
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Design and realization of small wireless network
Žebrák, Miroslav ; Pinkas, Otakar (advisor) ; Šmejkal, Ivo (referee)
This work deals with the design and realization of small wireless network. The achievement of the goal was enabled due to unique design tool and supported by thorough analysis. The first part describes wireless networks in general terms including types of networks and suitable places for its implementing. The next part focuses on norms, technologies and topology that wireless networks can use. The last chapter of the theoretical part explains basic terms of networks safety. The design of school wireless network and the computation of signal coverage is the main part of the work. The contribution of this work is that it serves as an example of the design system that shows how the design might be precise. Such a design can be the basis for the building up wireless network and enables subsequent verification of predicted results.
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Information society and wireless municipal networks
Svěcený, Jan ; Doucek, Petr (advisor) ; Klas, Jan (referee)
Nowadays the information society is a very often discussed topic, but lots of people don't know precisely what this idea means, or they have different opinions. The main characteristics of information society are labor with data, digital elaboration, ways of storage and data transportation. In these times labor with data is becoming an economical activity, that runs trough all segments. We are living in the age of digitalization and the rate of progression is still rising. This theme is also important in public sector. One of elementary activities in public sector is rising digital awareness of inhabitants. Other goal local governments are aiming for is providing high level and high quality information and communication services. One of the ways to achieve these goals is without doubt building wireless municipal networks. There are several investor models for implementing these municipal networks. There are also several models that address the various ways these networks can contribute to their users. Purpose of this study is to define and explain elementary terms such as "information society" and "municipal network" and other terms that are connected with these. Another object of this study is to show different ways to implement these wireless municipal networks and also to show examples where the act of implementation of municipal network has already been processed and make success assessment of existing implementations from the initiator -- local government's point of view.
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