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Cryptography protocol with public key
Fujdiak, Radek ; Rášo, Ondřej (referee) ; Mlýnek, Petr (advisor)
The Master thesis is an introduction to cryptology. The Thesis describe cryptosystems and selects one ideal cypher for low-power microcontroler. In thesis provides manual for instal development program COde Composer Studio, basic implementation of selected cryptosystem with small numbers and suggestion for implementation selected cyptosystem with big numbers.
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Use of electronic signature in business communication
Bauer, Oldřich ; Konečný,, Vladimír (referee) ; Dvořák, Jiří (advisor)
Bachelors work is concerned with the electronic signature and it´s use at the most modern level and it is specialized on data security in the world of the eletronic documents. It describes the electronic signature and the electronic registry in technical and legislative way with the use in practice and concrete firm. It also includes information about digital libraries, protection of author rights and personal data, electronic registry and business communication. This work gives comprehensive formulation about the problems of actual state of the legislative and the use in practice.
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Security of data stored on the hard disk
Polášková, Markéta ; Hajný, Jan (referee) ; Martinásek, Zdeněk (advisor)
This work is dedicated to the security of data stored on the hard drive of your computer and using encryption. The first part explains the basic concepts of cryptography and describes her in history. In other chapters, this work is dedicated to a description of the side channels and attacks on these channels. How can the attacker obtain information from a cryptographic module. The following section describes the types of encryption they use nowadays and what are their weaknesses. Bachelor thesis continues with examples of individual encryption programs and device ICZ Protect Boot. The last part deals with resistance testing on equipment ICZ Protect Boot. Testing of resistance to flow analysis using a side channel. Finally, bachelor thesis deals with the analysis of communication between the computer and ICZ Protect Boot.
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Design of hardware cipher module
Bayer, Tomáš ; Stančík, Peter (referee) ; Sobotka, Jiří (advisor)
This diploma’s thesis discourses the cryptographic systems and ciphers, whose function, usage and practical implementation are analysed. In the first chapter basic cryptographic terms, symmetric and asymetric cryptographic algorithms and are mentioned. Also usage and reliability are analysed. Following chapters mention substitution, transposition, block and stream ciphers, which are elementary for most cryptographic algorithms. There are also mentioned the modes, which the ciphers work in. In the fourth chapter are described the principles of some chosen cryptographic algorithms. The objective is to make clear the essence of the algorithms’ behavior. When describing some more difficult algorithms the block scheme is added. At the end of each algorithm’s description the example of practical usage is written. The chapter no. five discusses the hardware implementation. Hardware and software implementation is compared from the practical point of view. Several design instruments are described and different hardware design programming languages with their progress, advantages and disadvantages are mentioned. Chapter six discourses the hardware implementation design of chosen ciphers. Concretely the design of stream cipher with pseudo-random sequence generator is designed in VHDL and also in Matlab. As the second design was chosen the block cipher GOST, which was designed in VHDL too. Both designs were tested and verified and then the results were summarized.
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Application of ACO to simple subsitution ciphers
Turek, Luboš ; Tůma, Jiří (advisor) ; Surynek, Pavel (referee)
Název práce: Použití ACO algoritmu na řešení jednoduché substituční šifry Autor: Luboš Turek Katedra (ústav): Katedra algebry Vedoucí bakalářské práce: doc. RNDr. Jiří Tůma, DrSc. e-mail vedoucího: jiri.tuma@mff.cuni.cz Abstrakt: V předložené práci studujeme kombinatorickou metaheuristiku Ant Colony Optimization a zkoumáme možné způsoby jejího použití k pro- lomení jednoduché substituční šifry. Součástí práce je návrh a implementace programu. Tento program je srovnán s genetickým algoritmem. Klíčová slova: jednoduchá substituční šifra, ant colony optimization, ACO, kryptologie, kryptografie Title: Application of ACO to simple subsitution ciphers Author: Luboš Turek Department: Department of Algebra Supervisor: doc. RNDr. Jiří Tůma, DrSc. Supervisor's e-mail address: jiri.tuma@mff.cuni.cz Abstract: In the present work we study combinatorial metaheuristic Ant Colony Optimization and we search for its application to the problem of cracking simple subtitution cipher. Functional implementation is a part of the thesis. The program is compared to genetic algorithm. Keywords: simple substitution cipher, ant colony optimization, ACO, cryp- tology, cryptography 6
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Application of ACO to simple subsitution ciphers
Turek, Luboš ; Tůma, Jiří (advisor) ; Holub, Štěpán (referee)
Název práce: Použití ACO algoritmu na řešení jednoduché substituční šifry Autor: Luboš Turek Katedra (ústav): Katedra algebry Vedoucí bakalářské práce: doc. RNDr. Jiří Tůma, DrSc. e-mail vedoucího: jiri.tuma@mff.cuni.cz Abstrakt: V předložené práci studujeme kombinatorickou metaheuristiku Ant Colony Optimization a zkoumáme možné způsoby jejího použití k pro- lomení jednoduché substituční šifry. Součástí práce je návrh a implementace programu. Klíčová slova: jednoduchá substituční šifra, ant colony optimization, ACO, kryptologie, kryptografie Title: Application of ACO to simple subsitution ciphers Author: Luboš Turek Department: Department of Algebra Supervisor: doc. RNDr. Jiří Tůma, DrSc. Supervisor's e-mail address: jiri.tuma@mff.cuni.cz Abstract: In the present work we study combinatorial metaheuristic Ant Colony Optimization and we search for its application to the problem of cracking simple subtitution cipher. Functional implementation is a part of the thesis. Keywords: simple substitution cipher, ant colony optimization, ACO, cryp- tology, cryptography 5
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Historical encryption procedures and their application
MILICHOVSKÁ, Eva
I deal with historical encryption procedures and with their application in teaching in my diploma thesis. I present a brief list of some encryption methods in following chapters which were used from antiquity to the mid-20th century. There are prepared specific worksheets for encryption and decryption in this thesis. For several ciphers, the required tools are included in this work, too.
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Application of ACO to simple subsitution ciphers
Turek, Luboš ; Tůma, Jiří (advisor) ; Holub, Štěpán (referee)
Název práce: Použití ACO algoritmu na řešení jednoduché substituční šifry Autor: Luboš Turek Katedra (ústav): Katedra algebry Vedoucí bakalářské práce: doc. RNDr. Jiří Tůma, DrSc. e-mail vedoucího: jiri.tuma@mff.cuni.cz Abstrakt: V předložené práci studujeme kombinatorickou metaheuristiku Ant Colony Optimization a zkoumáme možné způsoby jejího použití k pro- lomení jednoduché substituční šifry. Součástí práce je návrh a implementace programu. Klíčová slova: jednoduchá substituční šifra, ant colony optimization, ACO, kryptologie, kryptografie Title: Application of ACO to simple subsitution ciphers Author: Luboš Turek Department: Department of Algebra Supervisor: doc. RNDr. Jiří Tůma, DrSc. Supervisor's e-mail address: jiri.tuma@mff.cuni.cz Abstract: In the present work we study combinatorial metaheuristic Ant Colony Optimization and we search for its application to the problem of cracking simple subtitution cipher. Functional implementation is a part of the thesis. Keywords: simple substitution cipher, ant colony optimization, ACO, cryp- tology, cryptography 5
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Application of ACO to simple subsitution ciphers
Turek, Luboš ; Tůma, Jiří (advisor) ; Surynek, Pavel (referee)
Název práce: Použití ACO algoritmu na řešení jednoduché substituční šifry Autor: Luboš Turek Katedra (ústav): Katedra algebry Vedoucí bakalářské práce: doc. RNDr. Jiří Tůma, DrSc. e-mail vedoucího: jiri.tuma@mff.cuni.cz Abstrakt: V předložené práci studujeme kombinatorickou metaheuristiku Ant Colony Optimization a zkoumáme možné způsoby jejího použití k pro- lomení jednoduché substituční šifry. Součástí práce je návrh a implementace programu. Tento program je srovnán s genetickým algoritmem. Klíčová slova: jednoduchá substituční šifra, ant colony optimization, ACO, kryptologie, kryptografie Title: Application of ACO to simple subsitution ciphers Author: Luboš Turek Department: Department of Algebra Supervisor: doc. RNDr. Jiří Tůma, DrSc. Supervisor's e-mail address: jiri.tuma@mff.cuni.cz Abstract: In the present work we study combinatorial metaheuristic Ant Colony Optimization and we search for its application to the problem of cracking simple subtitution cipher. Functional implementation is a part of the thesis. The program is compared to genetic algorithm. Keywords: simple substitution cipher, ant colony optimization, ACO, cryp- tology, cryptography 6
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