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Wireless M-Bus Key Retrieval
Mikula, Ondřej ; Matoušek, Petr (referee) ; Polčák, Libor (advisor)
This thesis aims to create a plugin for one of existing password recovery tools to extend its functionality to support encrypted messages of Wireless Meter Bus protocol. As a result, two plugins for the Hashcat tool have been implemented, supporting security modes 05 and 07 of Wireless M-Bus. Those modes are making use of the AES-128 encryption algorithm, so it is dealt with throughout this thesis. The resulting plugins are capable of speeds in range of tens to hundreds Mhash/s, which makes it unfeasible to check the whole AES-128 keyspace in a reasonable time. Nevertheless, if the searched keyspace is appropriately reduced, the created plugins make it possible to perform an security audit of the Wireless M-Bus deployment, which is required to be done by the specification.
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CCD detection of media meters with RF communication
Petřek, Miroslav ; Kaczmarczyk, Václav (referee) ; Bradáč, Zdeněk (advisor)
The aim of the bachelor thesis is to design and implement devices capable of sensing and transmitting states wirelessly, meaning the measured values of the consumption meters. In the work are first briefly described the basic types of the consumption meters and their possibilities of processing and transmission of the measured data. Furthermore, the most common types of communications used today for data transfer between sensors and microcontrollers are mentioned. The design of the device itself consists of identifying suitable units and their properties and then choosing the circuits. In the work is briefly described the process of schematic and printed circuit boards design, their installation with selected components and modules and the subsequent first startup. The penultimate part of the thesis deals with the design of software for commissioning and communication between the computer and individual components of the device. At the end, the results and suggestions for improvement of the existing equipment are consulted.
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Wireless M-Bus Key Retrieval
Mikula, Ondřej ; Matoušek, Petr (referee) ; Polčák, Libor (advisor)
This thesis aims to create a plugin for one of existing password recovery tools to extend its functionality to support encrypted messages of Wireless Meter Bus protocol. As a result, two plugins for the Hashcat tool have been implemented, supporting security modes 05 and 07 of Wireless M-Bus. Those modes are making use of the AES-128 encryption algorithm, so it is dealt with throughout this thesis. The resulting plugins are capable of speeds in range of tens to hundreds Mhash/s, which makes it unfeasible to check the whole AES-128 keyspace in a reasonable time. Nevertheless, if the searched keyspace is appropriately reduced, the created plugins make it possible to perform an security audit of the Wireless M-Bus deployment, which is required to be done by the specification.
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CCD detection of media meters with RF communication
Petřek, Miroslav ; Kaczmarczyk, Václav (referee) ; Bradáč, Zdeněk (advisor)
The aim of the bachelor thesis is to design and implement devices capable of sensing and transmitting states wirelessly, meaning the measured values of the consumption meters. In the work are first briefly described the basic types of the consumption meters and their possibilities of processing and transmission of the measured data. Furthermore, the most common types of communications used today for data transfer between sensors and microcontrollers are mentioned. The design of the device itself consists of identifying suitable units and their properties and then choosing the circuits. In the work is briefly described the process of schematic and printed circuit boards design, their installation with selected components and modules and the subsequent first startup. The penultimate part of the thesis deals with the design of software for commissioning and communication between the computer and individual components of the device. At the end, the results and suggestions for improvement of the existing equipment are consulted.
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