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Cryptographic algorithms for low-power IoT devices
Oszelda, Matěj ; Dobiáš, Patrik (referee) ; Dzurenda, Petr (advisor)
The bachelor thesis analyses the possibilities of application of operating systems, cryptographic libraries and their primitives in memory, performance and computationally constrained IoT environment. It then implements selected tools for securing communication in a system with constrained IoT devices. The theoretical part discusses the IoT, the different operating systems and cryptographic libraries in this environment. It then presents the measurement and comparison of cryptographic libraries and their primitives. Based on the measurements, it selects tools for implementation in securing the communication of IoT devices. It then creates a design and implements the system.
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Cryptography on an embedded platform
Korenčiak, Peter ; Hynčica, Ondřej (referee) ; Fiedler, Petr (advisor)
This bachelor thesis deals with adjusting parts of the public domain cryptographic library LibTomCrypt so that it can be used on an embedded platform Rabbit 3000. The hash functions MD5, SHA-1 and RIPEMD-128, the Blowfish cipher and CBC block cipher mode have been successfully ported to this platform. These algorithms have been analysed by measuring of the exectution time for the computational power requirements, especially with regard to the length of the input data. The abovementioned hash functions showed non-linear relationship between the execution time and the length of input, the graph of which is like that of a step function. The non-existence of the relationship to the data values was confirmed. The measurements with Blowfish cipher in CBC block cipher mode showed that inicialization of cipher is time consuming (it lasted almost one second on the hardware used) and that it does not depend on the keysize or length of input. The encryption and decryption itself showed a linear relationship to input data length. In the scope of this thesis there was also verification of correct function of SSL/TLS library from the producer of Rabbit microprocessor by creating a HTTPS server and verifying that secure connection with the web browser has been established. The library worked correctly according to manual without any significant problems.
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Cryptography on an embedded platform
Korenčiak, Peter ; Hynčica, Ondřej (referee) ; Fiedler, Petr (advisor)
This bachelor thesis deals with adjusting parts of the public domain cryptographic library LibTomCrypt so that it can be used on an embedded platform Rabbit 3000. The hash functions MD5, SHA-1 and RIPEMD-128, the Blowfish cipher and CBC block cipher mode have been successfully ported to this platform. These algorithms have been analysed by measuring of the exectution time for the computational power requirements, especially with regard to the length of the input data. The abovementioned hash functions showed non-linear relationship between the execution time and the length of input, the graph of which is like that of a step function. The non-existence of the relationship to the data values was confirmed. The measurements with Blowfish cipher in CBC block cipher mode showed that inicialization of cipher is time consuming (it lasted almost one second on the hardware used) and that it does not depend on the keysize or length of input. The encryption and decryption itself showed a linear relationship to input data length. In the scope of this thesis there was also verification of correct function of SSL/TLS library from the producer of Rabbit microprocessor by creating a HTTPS server and verifying that secure connection with the web browser has been established. The library worked correctly according to manual without any significant problems.
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