|
|
Simulation of cryptographic algorithms using FPGA
Németh, František ; Mašek, Jan (referee) ; Smékal, David (advisor)
Bachelor thesis is dealing with a cipher standard AES and with a design of encryption and decryption components for AES in special modes of operation. Programming language is VHDL. In theoretical part of thesis is a further descriptions of AES and behaviour of block cipher operation modes. Furthermore the brief description of VHDL, FPGA and NetCOPE framework is a piece of theoretical part as well. The practical part contains designs which are made in developing environment Vivado from Xilinx. Programmed modes of operation are ECB, CBC, CTR and CFB. Simulation outputs and synthesis results are summerized in tables.
|
|
|
SMS Encryption for Mobile Communication
Lisoněk, David ; Bouška, Petr (referee) ; Drahanský, Martin (advisor)
This thesis deals with encryption of short text message (SMS) in mobile communication. Introduction is dedicated to overview of the parts of GSM radiotelephone nets and SMS messages transfer . Next chapter is reserved for description of cryptographic methods especially symetric and asymetric encryptografic aproaches. A design of a SMS messages encryption and decryption techniques is in next. For SMS encryption and sign, there is used the asymetric cypher RSA. Encryption use OAEP padding schema. The public key is saved in certificate. The Symbian OS has been choosen as a suitable platform for programming of mobile devices.
|
|
|
Security risks of wireless access networks
Špidla, Milan ; Hošek, Jiří (referee) ; Polívka, Michal (advisor)
Master´s thesis „Security risks of wireless access networks“ deals with wireless access networks, which are the most widespread in this time. The main target is realization of attacks wireless access networks protected by various using methods. This thesis shows main securities gaps, which originate from project this networks. These securities gaps are used for realization attacts in practical part. In the next part I took attention of network´s monitoring possibilities.
|
|
|
Software support for cryptography education
Stančík, Peter ; Vyoral, Josef (referee) ; Burda, Karel (advisor)
The main aim of this thesis was to study, choose and decribe techniques eligible for cryptography education. A pedagogically appropriate presentation for the selected techniques' principles was to be chosen. Another goal was to create an integrated modular web interface containing a calculator focused on cryptographic operations. The eligibility of techniques was assessed accordingly to the computing processes implied by these techniques and also accordingly to the ability of being presented in an illustrative way. A program simplifying calculations used in symetric and asymetric cryptography was designed and implemented. It disposes of a web interface and one of its parts is focused on steganographic techniques. On the other hand, any pedagogically appropriate presentation interconnecting this program with theoretical findings from this field was not found.
|
|
|
Automatization of MitM Attack for SSL/TLS Decryption
Marušic, Marek ; Lichtner, Ondrej (referee) ; Pluskal, Jan (advisor)
SSL/TLS are protocols used to encrypt network traffic. They provide secure communication between clients and servers. The communication can be intercepted with MitM attack. This paper is aimed to describe the automatization of MitM attack and demonstrate its results. The automatization is done by MitM probe and a python script, which configures the probe and starts the attack. The script is easy to use, without great effort. It takes care of configuration of the probe, then it starts the tools used for network traffic capture and at last it starts MitM tools to perform the attack. During the MitM attack, users are warned by client applications about insecure connection. The client applications either provide an option to establish a connection anyway or it forbids clients to establish the connection with insecure parameters. In this paper, the users can learn what are SSL/TLS protocols and about a possibility how to intercept the network traffic encrypted by these protocols.
|
|
|
Design and implementation of Twofish cipher on the FPGA network card
Cíbik, Peter ; Martinásek, Zdeněk (referee) ; Smékal, David (advisor)
This bachelor thesis deals with implementation of block cipher Twofish on the FPGA platform in VHDL language. The teoretical introduction explains basics of cryptography and symetric ciphers block operation modes, FPGA platform and introduction to VHDL language. In the next part the Twofish cipher, its components and flow are being dis- cussed in depth. Subsequently describes design of Twofish cipher in VHDL language and induvidual steps in this process. The last part deals with own implementation on hardware card with FPGA chip and summarizes reached goals.
|
|
|
Post-quantum cryptography on constrained devices
Matula, Lukáš ; Dzurenda, Petr (referee) ; Malina, Lukáš (advisor)
In recent years, there has been a lot of technological development, which among other things, brings the designs and implementation of quantum computing. Using Shor’s algorithm for quantum computing, it is highly likely that the mathematical problems, which underlie the cryptographic systems, will be computed in polynomial time. Therefore, it is necessary to pay attention to the development of post-quantum cryptography, which is able to secure systems against quantum attacks. This work includes the summary and the comparison of different types of post-quantum cryptography, followed by measuring and analysing its levels of difficulty in order to implement them into limited devices, such as smart cards. The measured values on the PC are used to determine the most suitable implementation on the circuit card and then the verification method itself is implemented on it.
|
|
|
Possibilities of data analysis from CAN bus
Krišková, Mahulena ; Pančík, Juraj (referee) ; Belák, Michal (advisor)
This Master’s thesis covers possibilities of data collection and data analysis from CAN. Historical background and current trends are described as well as the principle of operation. The aim of this thesis was to provide several methods of data reading and subsequently their possible ways of interpretation for purposes of Forensic Engineering, more precisely, in the terms of vehicle driving dynamics. Owing to the fact the messages on the CAN bus are themselves encoded, one is unable to read them without further decryption. However, the possibilities of decoding are limited. Individual methods of data reading, collection, and analysis are presented. The analysis is focused on the process of data collection form CAN bus and data decryption. From several software options, one was selected as a tool for experimental part.
|
|
|
Protection of highspeed communication systems
Smékal, David ; Martinásek, Zdeněk (referee) ; Hajný, Jan (advisor)
The diploma thesis deals with 128–bit AES data encryption and its implementation in FPGA network card using VHDL programming language. The theoretical part explains AES encryption and decryption, its individual steps and operating modes. Further was described the VHDL programming language, development environment Vivado, FPGA network card Combo–80G and configurable framework NetCOPE. The practical part is the implementation of AES–128 in VHDL. A simulation was used to eliminate errors, then the synthesis was performed. These steps were made using Vivado software. Last step of practical part was testing of synthesized firmware on COMBO–80G card. Total of 4 projects were implemented in FPGA card. Two of them were AES encryption and decryption with ECB mode and another two describe the encryption and decryption with CBC mode.
|
|
|
Web application for file encryption
Tatar, Martin ; Blažek, Petr (referee) ; Zeman, Václav (advisor)
The bachelor thesis is focused on developing a web application for file encryption. In the theoretical part symmetric encryption algorithms are divided into block ciphers and stream ciphers. Selected ciphers are described and their properties are compared. Then the modes of operation for block ciphers are described. The developed application encrypts both files and text inputs by the selected algorithm and can operate in various modes of operation. In addition to this functionality the application is supplemented with descriptions of available ciphers and modes of operation.
|
guest ::
