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1. State-of-the-art analysis of quantum cryptography: applications and future prospects.

Author

Sahu, Swastik Kumar, Mazumdar, Kaushik, Gong, Lihua, and Dong, Yumin

Subjects
QUANTUM cryptography, QUANTUM computers, PUBLIC key cryptography, ELLIPTIC curve cryptography, QUANTUM computing, QUANTUM superposition, TELECOMMUNICATION systems
Abstract

Quantum computing provides a revolution in computational competences, leveraging the principles of quantum mechanics to process data in fundamentally novel ways. This paper explores the profound implications of quantum computing on cryptography, focusing on the vulnerabilities it introduces to classical encryption methods such as RSA and ECC, and the emergence of quantum-resistant algorithms. We review the core principles of quantum mechanics, including superposition and entanglement, which underpin quantum computing and cryptography. Additionally, we examine quantum encryption algorithms, particularly Quantum Key Distribution (QKD) protocols and post-quantum cryptographic methods, highlighting their potential to secure communications in the quantum era. This analysis emphasizes the urgent need for developing robust quantum-resistant cryptographic solutions to safeguard sensitive information against the imminent threats posed by advancing quantum technologies. [ABSTRACT FROM AUTHOR]

Published
2024
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2. State-of-the-art analysis of quantum cryptography: applications and future prospects

Author

Swastik Kumar Sahu and Kaushik Mazumdar

Subjects
quantum mechanics, quantum communication, classical cryptography, quantum encryption, QKD, post-quantum cryptography, Physics, QC1-999
Abstract

Quantum computing provides a revolution in computational competences, leveraging the principles of quantum mechanics to process data in fundamentally novel ways. This paper explores the profound implications of quantum computing on cryptography, focusing on the vulnerabilities it introduces to classical encryption methods such as RSA and ECC, and the emergence of quantum-resistant algorithms. We review the core principles of quantum mechanics, including superposition and entanglement, which underpin quantum computing and cryptography. Additionally, we examine quantum encryption algorithms, particularly Quantum Key Distribution (QKD) protocols and post-quantum cryptographic methods, highlighting their potential to secure communications in the quantum era. This analysis emphasizes the urgent need for developing robust quantum-resistant cryptographic solutions to safeguard sensitive information against the imminent threats posed by advancing quantum technologies.

Published
2024
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3. Securing Medical Images Using Quantum Key Distribution Scheme BB84

Author

Roy, Siddhartha, Ghosh, Anushka, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Bhattacharya, Abhishek, editor, Dutta, Soumi, editor, Dutta, Paramartha, editor, and Piuri, Vincenzo, editor

Published
2023
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5. Breaking Barriers in Conventional Cryptography by Integrating with Quantum Key Distribution.

Author

Ahilan, A. and Jeyam, A.

Subjects
QUANTUM cryptography, CRYPTOGRAPHY, DATA security, DATA transmission systems, LOCKS & keys, PUFFERS (Fish), PUBLIC key cryptography
Abstract

Security techniques based on conventional cryptography assume keys are disseminated prior to secure communications in traditional security mechanisms. The essential function of transmitting and sharing a secret key between two entities is the safe key management technique, which is the most important components to be concerned about when incorporating cryptographic activities into any system. If the key management procedures are ineffective, the system will be vulnerable to vulnerabilities and potentially lethal outsider attacks. Quantum cryptography is a method of securely encrypting information sent between parties while also detecting intruders attempting to listen in on the discussion. Quantum cryptography holds promise as a solution to these and other issues. In this paper,we discuss the Quantum key distribution (BB84 protocol) and how when integrated with conventional cryptography algorithms it increases security in data transmission to a remarkably high level. We also compare the cryptography algorithms for different file sizes and measure their performance by calculating the Encryption,decryption,throughput and Avalanche effect of the algorithms with and without QKD. The elapsed time of the conventional algorithm with QKD achieve 56.8%, 58.6% and 54.3% less time than AES, 3DES and Blowfish respectively. [ABSTRACT FROM AUTHOR]

Published
2023
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6. Impact of Computational Power on Cryptography

Author

Bhat, M. Iqbal, Giri, Kaiser J., Bansal, Jagdish Chand, Series Editor, Deep, Kusum, Series Editor, Nagar, Atulya K., Series Editor, Giri, Kaiser J., editor, Parah, Shabir Ahmad, editor, Bashir, Rumaan, editor, and Muhammad, Khan, editor

Published
2021
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7. New Trends for Securing Cybersecurity Data.

Author

Abdulwahhab, Saba Alaa, Hussien, Qasim Mohammed, and Taha, Emad F.

Subjects
QUANTUM cryptography, DIGITAL technology, INTERNET security, DATA encryption, DATA security, CRYPTOGRAPHY
Abstract

Copyright of Journal of Madenat Al-Elem University College / Magallaẗ Kulliyyaẗ Madīnaẗ Al-ʿAlam Al-Ğāmi'aẗ is the property of Republic of Iraq Ministry of Higher Education & Scientific Research (MOHESR) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2022

8. Quantum-Resistant TLS 1.3: A Hybrid Solution Combining Classical, Quantum and Post-Quantum Cryptography

Author

Garcia, Carlos Rubio, Aguilera, Abraham Cano, Vegas Olmos, Juan José, Monroy, Idelfonso Tafur, Rommel, Simon, Garcia, Carlos Rubio, Aguilera, Abraham Cano, Vegas Olmos, Juan José, Monroy, Idelfonso Tafur, and Rommel, Simon

Abstract

Hybrid authenticated key exchange combines cryptography key material from different sources (classical, quantum and post-quantum cryptography) to build protocols that are resilient to catastrophic failures, technology advances and future cryptanalytic attacks. In this work, we propose and implement a triple-hybrid version of the transport layer security network protocol TLS 1.3, combining classical and post-quantum cryptography, and quantum key distribution. We evaluate the performance of this triple-hybrid TLS in an experimental network scenario and our analysis shows that the quantum-resistant feature comes at an increased communication cost of approximately 68 % over the total time of the composite handshakes. In exchange, our solution is an enhancement to the TLS 1.3 protocol by adding quantum-resistant cryptography schemes.

Published
2024

9. Multi-party Quantum Key Agreement Protocol for Detection of Collusive Attacks in each Sub-Circle Segment by Headers.

Author

Sihare, Shyam R.

Abstract

It's conceivable to have a few dishonest participants when you want to exchange a secret key among participants in a certain network. Due to dishonest participants, a secret key could be altered and disclosed outside of a network. It is reasonable that each participant's involvement would be assessed by a certain organization. The same approach that a secret key must be protected by a header. The protocol to identify two dishonest members in a circular network was proposed by Liu et al. To identify conspirators, Sun et al. expand on the work of Liu et al. Sun et al. suggested a multiparty quantum key agreement protocol based on a circular-type, in which the dishonesty of each member was unknown. To investigate dishonesty, we append a header with a secret key to the Liu et al. and Sun et al. works. Because of the header, the following participants are aware of secret key tampering. Even if some participants became dishonest about a secret key, a circle-type network provided absolute security. There is no performance degradation of the proposed multiparty quantum key agreement protocol with addition of a header. [ABSTRACT FROM AUTHOR]

Published
2022
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10. Bi-symmetric Key Exchange: A Novel Cryptographic Key Exchanging Algorithm

Author

Sonthalia, Shekhar, Mandal, Trideep, Chakraborty, Mohuya, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Chakraborty, Mohuya, editor, Chakrabarti, Satyajit, editor, Balas, Valentina Emilia, editor, and Mandal, J. K., editor

Published
2019
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12. Pengamanan Citra Digital Berbasis Kriptografi Menggunakan Algoritma Vigenere Cipher

Author

Imam Riadi, Abdul Fadlil, and Fahmi Auliya Tsani

Subjects
digital image encryption, vigenere cipher, classical cryptography, base64 encoding, data security, Information technology, T58.5-58.64
Abstract

Cryptography is one of the most popular methods in data security by making data very difficult to read or even unreadable. One of the well-known techniques or algorithms in cryptography is Vigenere Cipher. This classic algorithm is classified as a polyalphabetic substitution cipher-based algorithm. Therefore, this algorithm tends to only handle data in text form. By this research, a console-based application has been developed which is made from PHP programming language to be able to encrypt and decrypt digital image media using Vigenere Cipher. The encryption process is done by first converting a digital image into a base64 encoding format so that the encryption process can be carried out using the tabula recta containing the radix-64 letter arrangement used for base64 encoding. Conversely, the decryption process is carried out by restoring the encrypted file using radix-64 letters, so we get the image file in the base64 encoding format. Then, the image with the base64 encoding format is decoded into the original file. The encryption process took less than 0,2 seconds and 0.19 seconds for the decryption process and 33.34% for average file size addition on the encrypted file from the original file size. Testing on ten different images with different sizes and dimensions showed a 100% success rate which means this research was successfully carried out.

Published
2022
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13. A Framework for Quantum-Classical Cryptographic Translation.

Author

Nimbe, Peter, Weyori, Benjamin Asubam, and Yeng, Prosper Kandabongee

Subjects
*QUANTUM computing, *REVERSIBLE computing, *QUANTUM computers, *QUBITS, *QUANTUM cryptography
Abstract

Quantum computing is the use of quantum-mechanical phenomena such as superposition and entanglement to perform computation. Quantum computers are believed to be able to solve certain computational problems, such as integer factorization significantly faster than classical computers. However, a lot of standardization is needed in the field of quantum and post-quantum computing as there is a lot of research ongoing and also due to the fact that NIST is currently reviewing proposed quantum cryptographic algorithms in a selection process. The dawn of quantum algorithms have arrived due to the emergence of quantum computing which could subsequently lead to a deprecation of classical cryptographic algorithms. Nevertheless, classical algorithms are still very useful and there is the need to bridge the gap between classical and quantum computing for the purposes of continuity and easy transfigurations. Reversible computing gives us the option of backtracking and reversibility, thus convincing some researchers as the future of computing. Currently, there is no simple model for converting quantum crypto to classical crypto and vice-versa. This paper proposes a theoretical framework for quantum-classical crypto program translation and vice-versa. The framework draws vital concepts and inspiration from the fields of classical computing, quantum computing and reversible computing. The model is detailed, implementable and is applicable to all quantum or classical programs and is presented for scientific action and examination. [ABSTRACT FROM AUTHOR]

Published
2021
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14. A New Modified Playfair Cipher.

Author

Yousif, Madeha Shaltagh, Salih, Raghad Kadhim, and Ghanim Alsaidi, Nadia Mohamed

Subjects
*CIPHERS, *EMAIL security, *INFORMATION theory
Abstract

The methods of encryption and decryption are used to protect the transferred information through public channels. The symmetric cipher methods that are based on the shared secrecy are preferable for this purpose. Playfair cipher is one of the classical symmetric ciphers; it has some limitation because it uses 5×5 matrix. To overcome this limitation, we propose in this paper a new encryption and decryption method based on the classical playfair cipher by expanding it to an n×n matrix with permutation and transposition. The security and the efficiency of the proposed method are demonstrated in comparing to the traditional and other modified playfair ciphers. [ABSTRACT FROM AUTHOR]

Published
2019
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18. A Hybrid Quantum Key Distribution Protocol for Tele-care Medicine Information Systems.

Author

Lai, Hong, Luo, Mingxing, Qu, Zhiguo, Xiao, Fuyuan, and Orgun, Mehmet A.

Subjects
TELEMEDICINE, CRYPTOGRAPHY, QUANTUM mechanics, COMPUTATIONAL complexity, HASHING
Abstract

The Internet has become an increasingly appealing medium for telecare medicine information systems (TMISs). However, the open nature of the Internet poses serious security threats and vulnerabilities to TMISs and privacy concerns to the patients and medical personnel. This work proposes a hybrid quantum key distribution protocol to provide security in TMISs, leveraging the key agreement of classical and quantum key distribution. Our protocol induces low energy and computation overheads to achieve privacy and trusted operations for TMISs. This is because quantum key distribution employs the principles of quantum mechanics rather than computational complexity, to avoid various attacks such as the man-in-the-middle attacks, the replay attacks and the passive attacks. Meanwhile, classical cryptography can be used to achieve user authentication efficiently. Therefore, our protocol may be available with the rapid developments of extensive experiments for quantum key distribution. [ABSTRACT FROM AUTHOR]

Published
2018
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19. Basic methods of modern cryptography

Author

Čačić, Ana and Horvat Dmitrović, Lana

Subjects
moderna kriptografija, cryptography, decoding, cryptosystem, TEHNIČKE ZNANOSTI. Računarstvo, dešifriranje, diffie-hellman, des, encoding, kriptosustav, classical cryptography, tajni ključ, rsa, TECHNICAL SCIENCES. Computing, public key, klasična kriptografija, javni ključ, private key, kriptografija, šifriranje, modern cryptography
Abstract

Cilj ovog završnog rada bio je analizirati neke metode moderne kriptografije. Ukratko je opisana povijest kriptografije. Dan je pregled osnovnih pojmova koji se koriste u kriptografiji te su opisane neke metode klasične kriptografije. Dana je podjela modernih kriptosustava te su neki najpoznatiji opisani u radu. U radu je opisano na koji način se u praksi koriste kriptografske metode i kako pomoću njih zadovoljiti sigurnosne zahtjeve komunikacijskih sustava. U praktičnom dijelu rada implementirani su DES, RSA i Diffie-Hellmanov protokol za razmjenu tajnog ključa u programskom jeziku Python. The goal of this bachelor thesis is to analyze some of the algorithms of modern cryptography. The history of cryptography is briefly described, a review of basic concepts of cryptography is given, and some methods of classical cryptography are described. Also, a classification of cryptosystems is given and some of the more known cryptosystems are described. It's explained how modern cryptographic algorithms are applied in the real world and how to satisfy the security requirements of communication systems using these algorithms. The practical part of this bachelor thesis gives an implementation of DES, RSA, and the Diffie–Hellman key exchange protocol in the programming language Python.

Published
2020

20. Cryptographic Methods During the Mexican Revolution.

Author

Angel Angel, Jose de Jesus and Morales-Luna, Guillermo

Subjects
*CRYPTOGRAPHY, *CIVIL war, *MEXICAN Revolution, Mexico, 1910-1920, *HISTORY
Abstract

This paper reviews an important period in the use of cryptographic methods in Mexican History, the Mexican Revolution from 1910-1916. As is the case in any civil war, there were many groups in conflict. Among several leaders in the Mexican Revolution, it is worth mentioning Porfirio Diaz, Francisco I. Madero and Venustiano Carranza. They represent three main groups which used characteristic cryptographic methods. In this paper, we describe some of the methods used by these groups during the Mexican Revolution. [ABSTRACT FROM AUTHOR]

Published
2009
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22. Automated Ciphertext - Only Cryptanalysis of the Bifid Cipher.

Author

Machiavelo, António and Reis, Rogério

Subjects
*CIPHERS, *CRYPTOGRAPHY, *LANGUAGE & languages, *STATISTICS, *CODE & cipher stories, *RESEARCH
Abstract

In this article, we describe a fully automated ciphertext-only cryptanalysis attack on the Bifid cipher, for which the original text language is known. We have implemented this attack using Python. We use an easily computable statistical function to find the period of the cipher, and then the key-table is generated in a fairly efficient way. The process is directed in a way that strongly narrows the search space of possible solutions. This results in a feasible attack to a Bifid cryptogram, provided that its length is sufficient for accurate statistical analysis. [ABSTRACT FROM AUTHOR]

Published
2007
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23. A new modified playfair cipher

Author

Raghad Kadhim Salih, Madeha Shaltagh Yousif, Nadia Mohamed Ghanim Alsaidi, and Maltepe Üniversitesi, İnsan ve Toplum Bilimleri Fakültesi

Subjects
Information theory, business.industry, Computer science, Transposition (telecommunications), Classical cryptography, Data_CODINGANDINFORMATIONTHEORY, Encryption, Playfair, law.invention, Permutation, Matrix (mathematics), Symmetric ciphers, Symmetric-key algorithm, Playfair cipher, law, Data_GENERAL, Secrecy, Hardware_ARITHMETICANDLOGICSTRUCTURES, Arithmetic, business
Abstract

The methods of encryption and decryption are used to protect the transferred information through public channels. The symmetric cipher methods that are based on the shared secrecy are preferable for this purpose. Playfair cipher is one of the classical symmetric ciphers; it has some limitation because it uses 5×5 matrix. To overcome this limitation, we propose in this paper a new encryption and decryption method based on the classical playfair cipher by expanding it to an n×n matrix with permutation and transposition. The security and the efficiency of the proposed method are demonstrated in comparing to the traditional and other modified playfair ciphers.

Published
2019

24. Overview and Analysis of Methods in Cryptography

Author

Svržnjak, Lorena and Horvat Dmitrović, Lana

Subjects
moderna kriptografija, cryptography, supstitucijske šifre, decryption, TEHNIČKE ZNANOSTI. Računarstvo, TEHNIČKE ZNANOSTI. Elektrotehnika, dešifriranje, transpozicijske šifre, classical cryptography, tajni ključ, TECHNICAL SCIENCES. Electrical Engineering, TECHNICAL SCIENCES. Computing, secret key, public key, klasična kriptografija, javni ključ, kriptografija, substitution cipher, transposition cipher, encryption, šifriranje, modern cryptography
Abstract

Kriptografija je znanost "tajnog pisanja", tj. znanost pohrane informacija tako da one budu čitljive samo onima kome su namijenjene. Koristi se matematikom i matematičkim metodama za šifriranje i dešifriranje podataka. Omogućuje tajno komuniciranje između dvije strane tako da treća strana ne može doći do značenja poruke bez ključa. Kriptografiju dijelimo na klasičnu i modernu. Unutar klasične kriptografije postoje supstitucijske šifre, šifre kod kojih se svako slovo otvorenog teksta zamjenjuje nekim drugim slovom ovisno o ključu, te transpozicijske šifre, šifre kod kojih slova otvorenog teksta mijenjaju položaj čime nastaje anagram. Modernu kriptografiju čine kriptosustavi s tajnim i javnim ključem. Kriptosustavi s tajnim ključem koriste isti ključ za šifriranje i dešifriranje stoga ključ mora biti tajan te se zbog toga takvi kriptosustavi nazivaju simetričnima. Najpoznatiji i najrašireniji takav kriptosustav je DES (engl. Data Encryption Standard). Kriptosustavi s javnim ključem koriste funkciju šifriranja iz koje je vrlo teško dobiti funkciju dešifriranja, pa funkcija šifriranja može biti javna što ukida potrebu razmjene ključeva koja je prisutna kod simetričnih kriptosustava. Još ih nazivamo asimetričnim kriptosustavima, a najpoznatiji takav je RSA kriptosustav. U sklopu rada implementirane su sve obrađene supstitucijske i transpozicijske šifre te RSA kriptosustav. Cryptography is the science of "secret writing", i.e. the science of data storage so that stored data is readable only to those to whom is intended. It uses mathematics and mathematical methods to encrypt and decrypt data. It enables secret communication between two sides so that third party can not understand the message without the key. We divide cryptography into classical and modern. Within classical cryptography there are substitution ciphers, ciphers in which each letter of plain text is replaced by some other letter depending on the key, and transposition ciphers, ciphers in which letters of the plain text change position to form anagram. Modern cryptography consists of cryptosystems with secret and public key. Cryptosystems with secret key use the same key for encryption and decryption, therefore the key must be secret and such cryptosystems are called symmetrical. The best known and most widely used is DES (Data Encryption Standard). Cryptosystems with public key use encryption function of which is very difficult to get the decryption function, therefore encryption function can be public which abolishes the need for key exchange which is present in symmetric cryptosystems. They are also called asymmetric cryptosystems and best known is RSA cryptosystems. All defined substitution and transposition cipher and the RSA cryptosystem are implemented.

Published
2015

25. Knihovna algoritmů pro šifrování textu

Author

Kubíček, Radek, Havel, Jiří, Mikulka, Jiří, Kubíček, Radek, Havel, Jiří, and Mikulka, Jiří

Abstract

Tato práce podává přehled historických i moderních metod a postupů využívaných v kryptografii. Popisuje a zhodnocuje šifry, které byly používány od samotných počátků šifrování informací až po šifry používané v dnešní době. Tento přehled by měl čtenáři poskytnout informace, na jejichž základě by byl schopen rozlišovat mezi jednotlivými šiframi, znát jejich výhody a nevýhody a umět zvolit nejvhodnější šifru pro konkrétní účel. Studované šifry jsou implementovány v knihovně CipherLib , která nabízí ukázku použití jednotlivých šifer., This thesis brings an overview of historical and modern methods and approaches used in cryptography. It also describes and assesses ciphers, which have been used since the very beginning of encryption till modern ciphers. Based on information resulting from this overview the reader should be able to distinguish between ciphers, know their advantages and disadvantages, and be able to choose the best cipher for any purpose. Ciphers mentioned in this thesis are implemented in a library called CipherLib , which shows usage of every described cipher.

26. Demonstrace kryptografických problémů formou interaktivní vzdělávací hry

Author

Mikulec, Marek, Mezina, Anzhelika, Fišarová, Anežka, Mikulec, Marek, Mezina, Anzhelika, and Fišarová, Anežka

Abstract

Bakalářská práce je zaměřená na návrh a realizaci kryptografické interaktivní vzdělávací hry. Věnuje se různým kryptografickým šifrám vybraných tak, aby i člověka mimo obor mohly seznámit s danou problematikou názornou a zábavnou formou. Jako programovací jazyk byla použita Java a JavaFX. Práce se sestává ze čtyř částí, z nichž první dvě jsou orientované na teoretickou část kryptografie a druhé dvě na praktické využití a vývoj v kódu. Jako motivace pro hráče bylo využito bodové ohodnocení za správně vyluštěné šifry. Dále práce obsahuje volbu obtížnosti, která má vliv na to, jaké šifry budou hráči prezentovány. Na závěr práce autor reflektuje nad výsledky a zkoumá možnosti dalšího vylepšení uvedených metod., The bachelor thesis is focused on the design and implementation of a cryptographic interactive educational game. It focuses on various cryptographic ciphers specifically selected so that people outside the field can be introduced to the subject in a demonstrative and entertaining way. Java and JavaFX were used as the programming language. The thesis consists of four parts, the first two are oriented towards the theoretical part of cryptography and the second two are more focused on the practical application and code development. As motivation for the players, a score for correctly cracked ciphers was used. Furthermore, the work includes a choice of difficulty, which influences which ciphers will be presented to the players. At the end of the thesis, the author reflects on the results and explores ways to further improve the methods presented.

27. Demonstrace kryptografických problémů formou interaktivní vzdělávací hry

Author

Mikulec, Marek, Mezina, Anzhelika, Fišarová, Anežka, Mikulec, Marek, Mezina, Anzhelika, and Fišarová, Anežka

Abstract

Bakalářská práce je zaměřená na návrh a realizaci kryptografické interaktivní vzdělávací hry. Věnuje se různým kryptografickým šifrám vybraných tak, aby i člověka mimo obor mohly seznámit s danou problematikou názornou a zábavnou formou. Jako programovací jazyk byla použita Java a JavaFX. Práce se sestává ze čtyř částí, z nichž první dvě jsou orientované na teoretickou část kryptografie a druhé dvě na praktické využití a vývoj v kódu. Jako motivace pro hráče bylo využito bodové ohodnocení za správně vyluštěné šifry. Dále práce obsahuje volbu obtížnosti, která má vliv na to, jaké šifry budou hráči prezentovány. Na závěr práce autor reflektuje nad výsledky a zkoumá možnosti dalšího vylepšení uvedených metod., The bachelor thesis is focused on the design and implementation of a cryptographic interactive educational game. It focuses on various cryptographic ciphers specifically selected so that people outside the field can be introduced to the subject in a demonstrative and entertaining way. Java and JavaFX were used as the programming language. The thesis consists of four parts, the first two are oriented towards the theoretical part of cryptography and the second two are more focused on the practical application and code development. As motivation for the players, a score for correctly cracked ciphers was used. Furthermore, the work includes a choice of difficulty, which influences which ciphers will be presented to the players. At the end of the thesis, the author reflects on the results and explores ways to further improve the methods presented.

28. Softwarová podpora výuky klasické kryptoanalýzy

Author

Burda, Karel, Hajný, Jan, Fojtová, Lucie, Burda, Karel, Hajný, Jan, and Fojtová, Lucie

Abstract

Některé z dneších moderních šifrovacích systémů obsahují ve svých základech myšlenky klasických symetrických šifer, jako je např. transpoziční princip v šifře DES. Pro úspěšnou kryptoanalýzu těchto druhů šifer je třeba znát základní krypoanalytické metody. Z toho plyne důležitost výuky klasické kryptoanalýzy - aby studenti co nejlépe pochopili danou problematiku, je třeba použít názorné pomůcky. Tato práce shrnuje poznatky teorie klasické kryptografie a krypotanalýzy vybraných druhů šifer - monoalfabetické a polyalfabetické substituce a dále jednoduché transpozice. Na základě této teorie je vytvořena softwarová podpora výuky klasické kryptoanalýzy - konkrétně formou webových stránek a aplikace umožňující šifrování a luštění klasických druhů šifer., Number of today's modern cipher systems are based on the classical symmetric cipher systems, such as the transposition principle in the DES cipher. Successful analysis and deciphering of these ciphers is therefore underlined by solid knowledge of the elementary cryptanalysis methods. This implies the importance of classical cryptanalysis education -- for better a understanding of the field, using visual means is of utmost importance. The aim of the thesis is to summarize selected cipher methods of the classical cryptanalysis, namely the mono-- and polyalphabetical substitution and transposition route cipher. Along with the theoretical part, ciphering/deciphering software is introduced to be used for educational purposes, particularly a website and a standalone application providing tools for ciphering, analysis and code breaking of the classical cipher based code.

29. Knihovna algoritmů pro šifrování textu

Author

Kubíček, Radek, Havel, Jiří, Mikulka, Jiří, Kubíček, Radek, Havel, Jiří, and Mikulka, Jiří

Abstract

Tato práce podává přehled historických i moderních metod a postupů využívaných v kryptografii. Popisuje a zhodnocuje šifry, které byly používány od samotných počátků šifrování informací až po šifry používané v dnešní době. Tento přehled by měl čtenáři poskytnout informace, na jejichž základě by byl schopen rozlišovat mezi jednotlivými šiframi, znát jejich výhody a nevýhody a umět zvolit nejvhodnější šifru pro konkrétní účel. Studované šifry jsou implementovány v knihovně CipherLib , která nabízí ukázku použití jednotlivých šifer., This thesis brings an overview of historical and modern methods and approaches used in cryptography. It also describes and assesses ciphers, which have been used since the very beginning of encryption till modern ciphers. Based on information resulting from this overview the reader should be able to distinguish between ciphers, know their advantages and disadvantages, and be able to choose the best cipher for any purpose. Ciphers mentioned in this thesis are implemented in a library called CipherLib , which shows usage of every described cipher.

30. Knihovna algoritmů pro šifrování textu

Author

Kubíček, Radek, Havel, Jiří, Kubíček, Radek, and Havel, Jiří

Abstract

Tato práce podává přehled historických i moderních metod a postupů využívaných v kryptografii. Popisuje a zhodnocuje šifry, které byly používány od samotných počátků šifrování informací až po šifry používané v dnešní době. Tento přehled by měl čtenáři poskytnout informace, na jejichž základě by byl schopen rozlišovat mezi jednotlivými šiframi, znát jejich výhody a nevýhody a umět zvolit nejvhodnější šifru pro konkrétní účel. Studované šifry jsou implementovány v knihovně CipherLib , která nabízí ukázku použití jednotlivých šifer., This thesis brings an overview of historical and modern methods and approaches used in cryptography. It also describes and assesses ciphers, which have been used since the very beginning of encryption till modern ciphers. Based on information resulting from this overview the reader should be able to distinguish between ciphers, know their advantages and disadvantages, and be able to choose the best cipher for any purpose. Ciphers mentioned in this thesis are implemented in a library called CipherLib , which shows usage of every described cipher.

31. Softwarová podpora výuky klasické kryptoanalýzy

Author

Burda, Karel, Hajný, Jan, Burda, Karel, and Hajný, Jan

Abstract

Některé z dneších moderních šifrovacích systémů obsahují ve svých základech myšlenky klasických symetrických šifer, jako je např. transpoziční princip v šifře DES. Pro úspěšnou kryptoanalýzu těchto druhů šifer je třeba znát základní krypoanalytické metody. Z toho plyne důležitost výuky klasické kryptoanalýzy - aby studenti co nejlépe pochopili danou problematiku, je třeba použít názorné pomůcky. Tato práce shrnuje poznatky teorie klasické kryptografie a krypotanalýzy vybraných druhů šifer - monoalfabetické a polyalfabetické substituce a dále jednoduché transpozice. Na základě této teorie je vytvořena softwarová podpora výuky klasické kryptoanalýzy - konkrétně formou webových stránek a aplikace umožňující šifrování a luštění klasických druhů šifer., Number of today's modern cipher systems are based on the classical symmetric cipher systems, such as the transposition principle in the DES cipher. Successful analysis and deciphering of these ciphers is therefore underlined by solid knowledge of the elementary cryptanalysis methods. This implies the importance of classical cryptanalysis education -- for better a understanding of the field, using visual means is of utmost importance. The aim of the thesis is to summarize selected cipher methods of the classical cryptanalysis, namely the mono-- and polyalphabetical substitution and transposition route cipher. Along with the theoretical part, ciphering/deciphering software is introduced to be used for educational purposes, particularly a website and a standalone application providing tools for ciphering, analysis and code breaking of the classical cipher based code.

32. Knihovna algoritmů pro šifrování textu

Author

Kubíček, Radek, Havel, Jiří, Kubíček, Radek, and Havel, Jiří

Abstract

Tato práce podává přehled historických i moderních metod a postupů využívaných v kryptografii. Popisuje a zhodnocuje šifry, které byly používány od samotných počátků šifrování informací až po šifry používané v dnešní době. Tento přehled by měl čtenáři poskytnout informace, na jejichž základě by byl schopen rozlišovat mezi jednotlivými šiframi, znát jejich výhody a nevýhody a umět zvolit nejvhodnější šifru pro konkrétní účel. Studované šifry jsou implementovány v knihovně CipherLib , která nabízí ukázku použití jednotlivých šifer., This thesis brings an overview of historical and modern methods and approaches used in cryptography. It also describes and assesses ciphers, which have been used since the very beginning of encryption till modern ciphers. Based on information resulting from this overview the reader should be able to distinguish between ciphers, know their advantages and disadvantages, and be able to choose the best cipher for any purpose. Ciphers mentioned in this thesis are implemented in a library called CipherLib , which shows usage of every described cipher.

33. Demonstrace kryptografických problémů formou interaktivní vzdělávací hry

Author

Mikulec, Marek, Mezina, Anzhelika, Mikulec, Marek, and Mezina, Anzhelika

Abstract

Bakalářská práce je zaměřená na návrh a realizaci kryptografické interaktivní vzdělávací hry. Věnuje se různým kryptografickým šifrám vybraných tak, aby i člověka mimo obor mohly seznámit s danou problematikou názornou a zábavnou formou. Jako programovací jazyk byla použita Java a JavaFX. Práce se sestává ze čtyř částí, z nichž první dvě jsou orientované na teoretickou část kryptografie a druhé dvě na praktické využití a vývoj v kódu. Jako motivace pro hráče bylo využito bodové ohodnocení za správně vyluštěné šifry. Dále práce obsahuje volbu obtížnosti, která má vliv na to, jaké šifry budou hráči prezentovány. Na závěr práce autor reflektuje nad výsledky a zkoumá možnosti dalšího vylepšení uvedených metod., The bachelor thesis is focused on the design and implementation of a cryptographic interactive educational game. It focuses on various cryptographic ciphers specifically selected so that people outside the field can be introduced to the subject in a demonstrative and entertaining way. Java and JavaFX were used as the programming language. The thesis consists of four parts, the first two are oriented towards the theoretical part of cryptography and the second two are more focused on the practical application and code development. As motivation for the players, a score for correctly cracked ciphers was used. Furthermore, the work includes a choice of difficulty, which influences which ciphers will be presented to the players. At the end of the thesis, the author reflects on the results and explores ways to further improve the methods presented.

34. Demonstrace kryptografických problémů formou interaktivní vzdělávací hry

Author

Mikulec, Marek, Mezina, Anzhelika, Mikulec, Marek, and Mezina, Anzhelika

Abstract

Bakalářská práce je zaměřená na návrh a realizaci kryptografické interaktivní vzdělávací hry. Věnuje se různým kryptografickým šifrám vybraných tak, aby i člověka mimo obor mohly seznámit s danou problematikou názornou a zábavnou formou. Jako programovací jazyk byla použita Java a JavaFX. Práce se sestává ze čtyř částí, z nichž první dvě jsou orientované na teoretickou část kryptografie a druhé dvě na praktické využití a vývoj v kódu. Jako motivace pro hráče bylo využito bodové ohodnocení za správně vyluštěné šifry. Dále práce obsahuje volbu obtížnosti, která má vliv na to, jaké šifry budou hráči prezentovány. Na závěr práce autor reflektuje nad výsledky a zkoumá možnosti dalšího vylepšení uvedených metod., The bachelor thesis is focused on the design and implementation of a cryptographic interactive educational game. It focuses on various cryptographic ciphers specifically selected so that people outside the field can be introduced to the subject in a demonstrative and entertaining way. Java and JavaFX were used as the programming language. The thesis consists of four parts, the first two are oriented towards the theoretical part of cryptography and the second two are more focused on the practical application and code development. As motivation for the players, a score for correctly cracked ciphers was used. Furthermore, the work includes a choice of difficulty, which influences which ciphers will be presented to the players. At the end of the thesis, the author reflects on the results and explores ways to further improve the methods presented.

35. Demonstrace kryptografických problémů formou interaktivní vzdělávací hry

Author

Mikulec, Marek, Mezina, Anzhelika, Mikulec, Marek, and Mezina, Anzhelika

Abstract

Bakalářská práce je zaměřená na návrh a realizaci kryptografické interaktivní vzdělávací hry. Věnuje se různým kryptografickým šifrám vybraných tak, aby i člověka mimo obor mohly seznámit s danou problematikou názornou a zábavnou formou. Jako programovací jazyk byla použita Java a JavaFX. Práce se sestává ze čtyř částí, z nichž první dvě jsou orientované na teoretickou část kryptografie a druhé dvě na praktické využití a vývoj v kódu. Jako motivace pro hráče bylo využito bodové ohodnocení za správně vyluštěné šifry. Dále práce obsahuje volbu obtížnosti, která má vliv na to, jaké šifry budou hráči prezentovány. Na závěr práce autor reflektuje nad výsledky a zkoumá možnosti dalšího vylepšení uvedených metod., The bachelor thesis is focused on the design and implementation of a cryptographic interactive educational game. It focuses on various cryptographic ciphers specifically selected so that people outside the field can be introduced to the subject in a demonstrative and entertaining way. Java and JavaFX were used as the programming language. The thesis consists of four parts, the first two are oriented towards the theoretical part of cryptography and the second two are more focused on the practical application and code development. As motivation for the players, a score for correctly cracked ciphers was used. Furthermore, the work includes a choice of difficulty, which influences which ciphers will be presented to the players. At the end of the thesis, the author reflects on the results and explores ways to further improve the methods presented.

36. Knihovna algoritmů pro šifrování textu

Author

Kubíček, Radek, Havel, Jiří, Kubíček, Radek, and Havel, Jiří

Abstract

Tato práce podává přehled historických i moderních metod a postupů využívaných v kryptografii. Popisuje a zhodnocuje šifry, které byly používány od samotných počátků šifrování informací až po šifry používané v dnešní době. Tento přehled by měl čtenáři poskytnout informace, na jejichž základě by byl schopen rozlišovat mezi jednotlivými šiframi, znát jejich výhody a nevýhody a umět zvolit nejvhodnější šifru pro konkrétní účel. Studované šifry jsou implementovány v knihovně CipherLib , která nabízí ukázku použití jednotlivých šifer., This thesis brings an overview of historical and modern methods and approaches used in cryptography. It also describes and assesses ciphers, which have been used since the very beginning of encryption till modern ciphers. Based on information resulting from this overview the reader should be able to distinguish between ciphers, know their advantages and disadvantages, and be able to choose the best cipher for any purpose. Ciphers mentioned in this thesis are implemented in a library called CipherLib , which shows usage of every described cipher.

37. Softwarová podpora výuky klasické kryptoanalýzy

Author

Burda, Karel, Hajný, Jan, Burda, Karel, and Hajný, Jan

Abstract

Některé z dneších moderních šifrovacích systémů obsahují ve svých základech myšlenky klasických symetrických šifer, jako je např. transpoziční princip v šifře DES. Pro úspěšnou kryptoanalýzu těchto druhů šifer je třeba znát základní krypoanalytické metody. Z toho plyne důležitost výuky klasické kryptoanalýzy - aby studenti co nejlépe pochopili danou problematiku, je třeba použít názorné pomůcky. Tato práce shrnuje poznatky teorie klasické kryptografie a krypotanalýzy vybraných druhů šifer - monoalfabetické a polyalfabetické substituce a dále jednoduché transpozice. Na základě této teorie je vytvořena softwarová podpora výuky klasické kryptoanalýzy - konkrétně formou webových stránek a aplikace umožňující šifrování a luštění klasických druhů šifer., Number of today's modern cipher systems are based on the classical symmetric cipher systems, such as the transposition principle in the DES cipher. Successful analysis and deciphering of these ciphers is therefore underlined by solid knowledge of the elementary cryptanalysis methods. This implies the importance of classical cryptanalysis education -- for better a understanding of the field, using visual means is of utmost importance. The aim of the thesis is to summarize selected cipher methods of the classical cryptanalysis, namely the mono-- and polyalphabetical substitution and transposition route cipher. Along with the theoretical part, ciphering/deciphering software is introduced to be used for educational purposes, particularly a website and a standalone application providing tools for ciphering, analysis and code breaking of the classical cipher based code.

38. Softwarová podpora výuky klasické kryptoanalýzy

Author

Burda, Karel, Hajný, Jan, Burda, Karel, and Hajný, Jan

Abstract

Některé z dneších moderních šifrovacích systémů obsahují ve svých základech myšlenky klasických symetrických šifer, jako je např. transpoziční princip v šifře DES. Pro úspěšnou kryptoanalýzu těchto druhů šifer je třeba znát základní krypoanalytické metody. Z toho plyne důležitost výuky klasické kryptoanalýzy - aby studenti co nejlépe pochopili danou problematiku, je třeba použít názorné pomůcky. Tato práce shrnuje poznatky teorie klasické kryptografie a krypotanalýzy vybraných druhů šifer - monoalfabetické a polyalfabetické substituce a dále jednoduché transpozice. Na základě této teorie je vytvořena softwarová podpora výuky klasické kryptoanalýzy - konkrétně formou webových stránek a aplikace umožňující šifrování a luštění klasických druhů šifer., Number of today's modern cipher systems are based on the classical symmetric cipher systems, such as the transposition principle in the DES cipher. Successful analysis and deciphering of these ciphers is therefore underlined by solid knowledge of the elementary cryptanalysis methods. This implies the importance of classical cryptanalysis education -- for better a understanding of the field, using visual means is of utmost importance. The aim of the thesis is to summarize selected cipher methods of the classical cryptanalysis, namely the mono-- and polyalphabetical substitution and transposition route cipher. Along with the theoretical part, ciphering/deciphering software is introduced to be used for educational purposes, particularly a website and a standalone application providing tools for ciphering, analysis and code breaking of the classical cipher based code.

39. Knihovna algoritmů pro šifrování textu

Author

Kubíček, Radek, Havel, Jiří, Mikulka, Jiří, Kubíček, Radek, Havel, Jiří, and Mikulka, Jiří

Abstract

Tato práce podává přehled historických i moderních metod a postupů využívaných v kryptografii. Popisuje a zhodnocuje šifry, které byly používány od samotných počátků šifrování informací až po šifry používané v dnešní době. Tento přehled by měl čtenáři poskytnout informace, na jejichž základě by byl schopen rozlišovat mezi jednotlivými šiframi, znát jejich výhody a nevýhody a umět zvolit nejvhodnější šifru pro konkrétní účel. Studované šifry jsou implementovány v knihovně CipherLib , která nabízí ukázku použití jednotlivých šifer., This thesis brings an overview of historical and modern methods and approaches used in cryptography. It also describes and assesses ciphers, which have been used since the very beginning of encryption till modern ciphers. Based on information resulting from this overview the reader should be able to distinguish between ciphers, know their advantages and disadvantages, and be able to choose the best cipher for any purpose. Ciphers mentioned in this thesis are implemented in a library called CipherLib , which shows usage of every described cipher.

40. Demonstrace kryptografických problémů formou interaktivní vzdělávací hry

Author

Mikulec, Marek, Mezina, Anzhelika, Fišarová, Anežka, Mikulec, Marek, Mezina, Anzhelika, and Fišarová, Anežka

Abstract

Bakalářská práce je zaměřená na návrh a realizaci kryptografické interaktivní vzdělávací hry. Věnuje se různým kryptografickým šifrám vybraných tak, aby i člověka mimo obor mohly seznámit s danou problematikou názornou a zábavnou formou. Jako programovací jazyk byla použita Java a JavaFX. Práce se sestává ze čtyř částí, z nichž první dvě jsou orientované na teoretickou část kryptografie a druhé dvě na praktické využití a vývoj v kódu. Jako motivace pro hráče bylo využito bodové ohodnocení za správně vyluštěné šifry. Dále práce obsahuje volbu obtížnosti, která má vliv na to, jaké šifry budou hráči prezentovány. Na závěr práce autor reflektuje nad výsledky a zkoumá možnosti dalšího vylepšení uvedených metod., The bachelor thesis is focused on the design and implementation of a cryptographic interactive educational game. It focuses on various cryptographic ciphers specifically selected so that people outside the field can be introduced to the subject in a demonstrative and entertaining way. Java and JavaFX were used as the programming language. The thesis consists of four parts, the first two are oriented towards the theoretical part of cryptography and the second two are more focused on the practical application and code development. As motivation for the players, a score for correctly cracked ciphers was used. Furthermore, the work includes a choice of difficulty, which influences which ciphers will be presented to the players. At the end of the thesis, the author reflects on the results and explores ways to further improve the methods presented.

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