Master the essentials of cryptography and cryptanalysis and learn how to put them to practical use. Each chapter of this book starts with an introduction to the concepts on which cryptographic algorithms are based and how they are used in practice, providing fully working examples for each of the algorithms presented. Implementation sections will guide you through the entire process of writing your own applications and programs using MATLAB. Cryptography and Cryptanalysis in MATLAB will serve as your definitive go-to cryptography reference, whether you are a student, professional developer, or researcher, showing how a multitude of cryptographic challenges can be overcome using the powerful tools of MATLAB. What You Will Learn Discover MATLAB’s cryptography functions Work with conversion mechanisms in MATLAB Implement cryptographic algorithms using arithmetic operations Understand the classical, simple cryptosystems that form the basis of modern cryptography Develop fully working solutions (encryption/decryption operations) Study pseudo-random generators and their real-life implementations Utilize hash functions by way of practical examples Implement solutions to defend against practical cryptanalysis methods and attacks Understand asymmetric and symmetric encryption systems and how to use them Leverage visual cryptography, steganography, and chaos-based cryptography Who This Book Is For Those who are new to cryptography/analysis. Some prior exposure to MATLAB recommended.
From the exciting history of its development in ancient times to the present day, Introduction to Cryptography with Mathematical Foundations and Computer Implementations provides a focused tour of the central concepts of cryptography. Rather than present an encyclopedic treatment of topics in cryptography, it delineates cryptographic concepts in chronological order, developing the mathematics as needed. Written in an engaging yet rigorous style, each chapter introduces important concepts with clear definitions and theorems. Numerous examples explain key points while figures and tables help illustrate more difficult or subtle concepts. Each chapter is punctuated with "Exercises for the Reader;" complete solutions for these are included in an appendix. Carefully crafted exercise sets are also provided at the end of each chapter, and detailed solutions to most odd-numbered exercises can be found in a designated appendix. The computer implementation section at the end of every chapter guides students through the process of writing their own programs. A supporting website provides an extensive set of sample programs as well as downloadable platform-independent applet pages for some core programs and algorithms. As the reliance on cryptography by business, government, and industry continues and new technologies for transferring data become available, cryptography plays a permanent, important role in day-to-day operations. This self-contained sophomore-level text traces the evolution of the field, from its origins through present-day cryptosystems, including public key cryptography and elliptic curve cryptography.
Cryptography is now ubiquitous – moving beyond the traditional environments, such as government communications and banking systems, we see cryptographic techniques realized in Web browsers, e-mail programs, cell phones, manufacturing systems, embedded software, smart buildings, cars, and even medical implants. Today's designers need a comprehensive understanding of applied cryptography. After an introduction to cryptography and data security, the authors explain the main techniques in modern cryptography, with chapters addressing stream ciphers, the Data Encryption Standard (DES) and 3DES, the Advanced Encryption Standard (AES), block ciphers, the RSA cryptosystem, public-key cryptosystems based on the discrete logarithm problem, elliptic-curve cryptography (ECC), digital signatures, hash functions, Message Authentication Codes (MACs), and methods for key establishment, including certificates and public-key infrastructure (PKI). Throughout the book, the authors focus on communicating the essentials and keeping the mathematics to a minimum, and they move quickly from explaining the foundations to describing practical implementations, including recent topics such as lightweight ciphers for RFIDs and mobile devices, and current key-length recommendations. The authors have considerable experience teaching applied cryptography to engineering and computer science students and to professionals, and they make extensive use of examples, problems, and chapter reviews, while the book’s website offers slides, projects and links to further resources. This is a suitable textbook for graduate and advanced undergraduate courses and also for self-study by engineers.
This book gathers selected research papers presented at the First International Conference on Digital Technologies and Applications (ICDTA 21), held at Sidi Mohamed Ben Abdellah University, Fez, Morocco, on 29–30 January 2021. highlighting the latest innovations in digital technologies as: artificial intelligence, Internet of things, embedded systems, network technology, information processing, and their applications in several areas such as hybrid vehicles, renewable energy, robotic, and COVID-19. The respective papers encourage and inspire researchers, industry professionals, and policymakers to put these methods into practice.
This accessible textbook presents a fascinating review of cryptography and cryptanalysis across history. The text relates the earliest use of the monoalphabetic cipher in the ancient world, the development of the “unbreakable” Vigenère cipher, and an account of how cryptology entered the arsenal of military intelligence during the American Revolutionary War. Moving on to the American Civil War, the book explains how the Union solved the Vigenère ciphers used by the Confederates, before investigating the development of cipher machines throughout World War I and II. This is then followed by an exploration of cryptology in the computer age, from public-key cryptography and web security, to criminal cyber-attacks and cyber-warfare. Looking to the future, the role of cryptography in the Internet of Things is also discussed, along with the potential impact of quantum computing. Topics and features: presents a history of cryptology from ancient Rome to the present day, with a focus on cryptology in the 20th and 21st centuries; reviews the different types of cryptographic algorithms used to create secret messages, and the various methods for breaking such secret messages; provides engaging examples throughout the book illustrating the use of cryptographic algorithms in different historical periods; describes the notable contributions to cryptology of Herbert Yardley, William and Elizebeth Smith Friedman, Lester Hill, Agnes Meyer Driscoll, and Claude Shannon; concludes with a review of tantalizing unsolved mysteries in cryptology, such as the Voynich Manuscript, the Beale Ciphers, and the Kryptos sculpture. This engaging work is ideal as both a primary text for courses on the history of cryptology, and as a supplementary text for advanced undergraduate courses on computer security. No prior background in mathematics is assumed, beyond what would be encountered in an introductory course on discrete mathematics.
This text is for a course in cryptography for advanced undergraduate and graduate students. Material is accessible to mathematically mature students having little background in number theory and computer programming. Core material is treated in the first eight chapters on areas such as classical cryptosystems, basic number theory, the RSA algorithm, and digital signatures. The remaining nine chapters cover optional topics including secret sharing schemes, games, and information theory. Appendices contain computer examples in Mathematica, Maple, and MATLAB. The text can be taught without computers.
Presenting encryption algorithms with diverse characteristics, Image Encryption: A Communication Perspective examines image encryption algorithms for the purpose of secure wireless communication. It considers two directions for image encryption: permutation-based approaches and substitution-based approaches. Covering the spectrum of image encryption principles and techniques, the book compares image encryption with permutation- and diffusion-based approaches. It explores number theory-based encryption algorithms such as the Data Encryption Standard, the Advanced Encryption Standard, and the RC6 algorithms. It not only details the strength of various encryption algorithms, but also describes their ability to work within the limitations of wireless communication systems. Since some ciphers were not designed for image encryption, the book explains how to modify these ciphers to work for image encryption. It also provides instruction on how to search for other approaches suitable for this task. To make this work comprehensive, the authors explore communication concepts concentrating on the orthogonal frequency division multiplexing (OFDM) system and present a simplified model for the OFDM communication system with its different implementations. Complete with simulation experiments and MATLAB® codes for most of the simulation experiments, this book will help you gain the understanding required to select the encryption method that best fulfills your application requirements.
This is the eBook of the printed book and may not include any media, website access codes, or print supplements that may come packaged with the bound book. The Principles and Practice of Cryptography and Network Security Stallings’ Cryptography and Network Security, Seventh Edition, introduces the reader to the compelling and evolving field of cryptography and network security. In an age of viruses and hackers, electronic eavesdropping, and electronic fraud on a global scale, security is paramount. The purpose of this book is to provide a practical survey of both the principles and practice of cryptography and network security. In the first part of the book, the basic issues to be addressed by a network security capability are explored by providing a tutorial and survey of cryptography and network security technology. The latter part of the book deals with the practice of network security: practical applications that have been implemented and are in use to provide network security. The Seventh Edition streamlines subject matter with new and updated material — including Sage, one of the most important features of the book. Sage is an open-source, multiplatform, freeware package that implements a very powerful, flexible, and easily learned mathematics and computer algebra system. It provides hands-on experience with cryptographic algorithms and supporting homework assignments. With Sage, the reader learns a powerful tool that can be used for virtually any mathematical application. The book also provides an unparalleled degree of support for the reader to ensure a successful learning experience.
This book presents an interactive Python application designed to showcase the ElGamal encryption algorithm through a user-friendly Tkinter graphical user interface (GUI). At its heart, the application focuses on the three core aspects of ElGamal cryptography: key generation, encryption, and decryption. Users can generate ElGamal keys of varying sizes by specifying the number of bits, and view these keys in multiple formats, including raw integers, hexadecimal, and Base64 encoding. This flexibility facilitates seamless integration of the keys into different systems and applications, making the tool invaluable for both educational purposes and practical implementations. Additionally, the application allows users to encrypt and decrypt data using the generated ElGamal keys, providing a comprehensive demonstration of how this cryptographic scheme secures information. The GUI simplifies the process of managing and visualizing encrypted and decrypted data, helping users understand the effectiveness of ElGamal encryption in maintaining data confidentiality. By combining these functionalities within an intuitive interface, the project not only illustrates key cryptographic concepts but also offers a hands-on approach to learning and applying ElGamal encryption in real-world scenarios. In chapter one, we developed a project which aims to create an intuitive graphical user interface (GUI) for generating and displaying ElGamal encryption keys using the Tkinter library. Users can specify the number of bits for key generation and view the keys in multiple formats, including raw integers, hexadecimal, and Base64 encoding. This flexibility ensures compatibility with various systems and applications, making it easier for users to integrate and verify cryptographic keys. The application features a tabbed interface that organizes the key generation process. Users can enter the desired key size in one tab and generate the keys with a button click. The keys are then displayed in separate tabs according to their format. This structured approach simplifies the comparison and verification of keys in different representations, enhancing the usability and effectiveness of the key management process. In chapter two, the fifth project integrates ElGamal encryption and decryption techniques into a user-friendly application for securing sensitive data, such as credit card numbers and transaction details. The application generates synthetic datasets to demonstrate these cryptographic methods in action, allowing users to create keys, encrypt data, and decrypt it to verify integrity and confidentiality.Built with Tkinter, the application provides an interactive experience with an intuitive graphical interface. Users can specify key generation parameters, generate synthetic transaction data, and view the original, encrypted, and decrypted data through a series of tabs. This design facilitates easy visualization of encryption and decryption effects, making the application a practical tool for understanding and experimenting with cryptographic operations. In chapter two, the ninth project involves developing a Tkinter-based GUI to demonstrate the ElGamal encryption algorithm using synthetic employee data. The application provides an intuitive platform for generating, encrypting, and decrypting data, while also visualizing results through interactive graphs. Users can manage data with multiple tabs for setup, original, encrypted, and decrypted views, and utilize matplotlib for visualizing data distributions and trends. By integrating data management, encryption, and visualization, the project offers a comprehensive tool for understanding and applying the ElGamal algorithm in a secure and user-friendly manner. In chapter three, the fourth project is designed to process Bitcoin transactions using the ElGamal encryption scheme. It features a comprehensive approach that includes generating, encrypting, decrypting, and analyzing Bitcoin transaction data. The core of the project is the integration of ElGamal encryption to ensure the confidentiality and integrity of transaction data, demonstrated through a user-friendly graphical interface. The application utilizes Tkinter for the interface and Matplotlib for data visualization, allowing users to interact with and analyze synthetic Bitcoin datasets. It supports functionalities like encryption, decryption, and digital signature verification, all while presenting data through intuitive visual graphs. This combination of encryption and visualization provides a robust tool for secure transaction processing and analysis. In chapter three, the sixth project is designed to demonstrate the integration of cryptographic techniques with data visualization and management through a graphical user interface (GUI) built using Tkinter. At its core, the project utilizes the ElGamal cryptosystem, a public-key cryptographic algorithm known for its security in encryption and digital signatures. The GUI enables users to interact with various functionalities of the ElGamal system, including encryption, decryption, and signature verification, all while managing and visualizing a synthetic dataset. The ElGamal class encapsulates the core cryptographic functionalities, providing methods for encrypting and decrypting messages, as well as signing and verifying signatures. It uses secure random number generation and hashing to ensure robust cryptographic operations. To facilitate testing and demonstration, the project includes a synthetic dataset generation function, generate_gov_dataset(), which creates a mock dataset simulating government documents with attributes like document IDs, classification levels, departments, and content. This dataset allows users to apply cryptographic techniques to structured data, providing a realistic scenario for data security operations. The process_dataset() function applies encryption and digital signatures to this synthetic dataset, transforming it into an encrypted format with corresponding signatures for content verification. The GUI, implemented in the ElGamalGUI class, serves as the primary interface, featuring tabs for viewing original and encrypted data, decrypted data, signatures, and distribution graphs. These visualizations help users understand the impact of encryption on data characteristics and evaluate the effectiveness of the cryptographic methods. Overall, this project provides a comprehensive tool for exploring cryptographic techniques in a user-friendly environment, offering valuable insights into practical applications of encryption and digital signatures in data security.
This book is dedicated to the development of a sophisticated and feature-rich Tkinter GUI that leverages Elliptic Curve Cryptography (ECC) for various cryptographic operations, including key generation, encryption, decryption, signing, and verifying data. The primary goal is to create an interactive application that allows users to perform these operations on synthetic financial data, demonstrating the practical use of ECC in securing sensitive information. The GUI is meticulously designed with multiple tabs, each corresponding to a different cryptographic function, enabling users to navigate through key generation, data encryption/decryption, and digital signature processes seamlessly. The GUI starts with the key generation tab, where users can generate ECC key pairs. These key pairs are essential for the subsequent encryption and signing operations. The GUI provides feedback on the generated keys, displaying the public and private keys in hexadecimal format. This feature is crucial for understanding the foundational role of ECC in modern cryptography, where small key sizes provide strong security. The key generation process also highlights the advantages of ECC over traditional RSA, particularly in terms of efficiency and security per bit length. In the encryption and decryption tab, the GUI enables users to encrypt synthetic financial data using the previously generated ECC keys. The encryption process is performed using AES in Cipher Feedback (CFB) mode, with the AES key derived from the ECC private key through key derivation functions. This setup showcases the hybrid approach where ECC is used for key exchange or key derivation, and AES is employed for the actual encryption of data. The GUI displays the generated ciphertext in a hexadecimal format, along with the Initialization Vector (IV) used in the encryption process, providing a clear view of how the encrypted data is structured. The signing and verifying tab demonstrates the use of ECC for digital signatures. Here, users can sign the synthetic financial data using the ECDSA (Elliptic Curve Digital Signature Algorithm), a widely recognized algorithm for ensuring data integrity and authenticity. The GUI displays the generated digital signature in hexadecimal format, offering insights into how ECC is applied in real-world scenarios like secure messaging and digital certificates. The verification process, where the signature is checked against the original data using the ECC public key, is also integrated into the GUI, emphasizing the importance of digital signatures in verifying data authenticity. The synthetic financial data used in these operations is generated within the GUI, simulating transaction records that include fields such as transaction ID, account number, amount, currency, timestamp, and transaction type. This dataset is crucial for demonstrating the encryption and signing processes in a context that mirrors real-world financial systems. By encrypting and signing this data, users can understand how ECC can be applied to protect sensitive information in financial transactions, ensuring both confidentiality and integrity. Finally, the GUI’s design incorporates user-friendly elements such as scrolled text widgets for displaying long hexadecimal outputs, entry fields for user inputs, and clear labels for guiding the user through each cryptographic operation. The application provides a comprehensive and interactive learning experience, allowing users to explore the intricacies of ECC in a controlled environment. By integrating ECC with AES for encryption and ECDSA for signing, the GUI offers a practical demonstration of how modern cryptographic techniques can be combined to secure data, making it an invaluable tool for anyone looking to understand or teach the principles of ECC-based cryptography.
