Download or read book Cryptography Decrypted written by H. X. Mel and published by Addison-Wesley Professional. This book was released on 2001 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: A clear, comprehensible, and practical guide to the essentials of computer cryptography, from Caesar's Cipher through modern-day public key. Cryptographic capabilities like detecting imposters and stopping eavesdropping are thoroughly illustrated with easy-to-understand analogies, visuals, and historical sidebars. The student needs little or no background in cryptography to read Cryptography Decrypted. Nor does it require technical or mathematical expertise. But for those with some understanding of the subject, this book is comprehensive enough to solidify knowledge of computer cryptography and challenge those who wish to explore the high-level math appendix.

Download or read book Decrypted Secrets written by Friedrich L. Bauer and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: In today's extensively wired world, cryptology is vital for guarding communication channels, databases, and software from intruders. Increased processing and communications speed, rapidly broadening access and multiplying storage capacity tend to make systems less secure over time, and security becomes a race against the relentless creativity of the unscrupulous. The revised and extended third edition of this classic reference work on cryptology offers a wealth of new technical and biographical details. The book presupposes only elementary mathematical knowledge. Spiced with exciting, amusing, and sometimes personal accounts from the history of cryptology, it will interest general a broad readership.

Download or read book Decrypted Secrets written by Friedrich L. Bauer and published by Springer Science & Business Media. This book was released on 2006-11-24 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: In today's extensively wired world, cryptology is vital for guarding communication channels, databases, and software from intruders. Increased processing and communications speed, rapidly broadening access and multiplying storage capacity tend to make systems less secure over time, and security becomes a race against the relentless creativity of the unscrupulous. The revised and extended third edition of this classic reference work on cryptology offers a wealth of new technical and biographical details. The book presupposes only elementary mathematical knowledge. Spiced with exciting, amusing, and sometimes personal accounts from the history of cryptology, it will interest general a broad readership.

Download or read book Decrypted Secrets written by F.L. Bauer and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cryptology, for millennia a "secret science", is rapidly gaining in practical importance for the protection of communication channels, databases, and software. Beside its role in computerized information systems, cryptology is finding more and more applications inside computer systems and networks, extending to access rights and source file protection. The first part of this book treats secret codes and their uses - cryptography - before moving on to the process of covertly decrypting a secret code - cryptanalysis. Spiced with a wealth of exciting, amusing, and occasionally personal stories from the history of cryptology, and presupposing only elementary mathematical knowledge, this book will also stimulate general readers.

Download or read book Decrypted Secrets written by Friedrich Ludwig Bauer and published by Springer Science & Business Media. This book was released on 2002 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: In today's unsafe and increasingly wired world cryptology plays a vital role in protecting communication channels, databases, and software from unwanted intruders. This revised and extended third edition of the classic reference work on cryptology now contains many new technical and biographical details. The first part treats secret codes and their uses - cryptography. The second part deals with the process of covertly decrypting a secret code - cryptanalysis, where particular advice on assessing methods is given. The book presupposes only elementary mathematical knowledge. Spiced with a wealth of exciting, amusing, and sometimes personal stories from the history of cryptology, it will also interest general readers.

Download or read book Real World Cryptography written by David Wong and published by Simon and Schuster. This book was released on 2021-10-19 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A staggeringly comprehensive review of the state of modern cryptography. Essential for anyone getting up to speed in information security." - Thomas Doylend, Green Rocket Security An all-practical guide to the cryptography behind common tools and protocols that will help you make excellent security choices for your systems and applications. In Real-World Cryptography, you will find: Best practices for using cryptography Diagrams and explanations of cryptographic algorithms Implementing digital signatures and zero-knowledge proofs Specialized hardware for attacks and highly adversarial environments Identifying and fixing bad practices Choosing the right cryptographic tool for any problem Real-World Cryptography reveals the cryptographic techniques that drive the security of web APIs, registering and logging in users, and even the blockchain. You’ll learn how these techniques power modern security, and how to apply them to your own projects. Alongside modern methods, the book also anticipates the future of cryptography, diving into emerging and cutting-edge advances such as cryptocurrencies, and post-quantum cryptography. All techniques are fully illustrated with diagrams and examples so you can easily see how to put them into practice. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. About the technology Cryptography is the essential foundation of IT security. To stay ahead of the bad actors attacking your systems, you need to understand the tools, frameworks, and protocols that protect your networks and applications. This book introduces authentication, encryption, signatures, secret-keeping, and other cryptography concepts in plain language and beautiful illustrations. About the book Real-World Cryptography teaches practical techniques for day-to-day work as a developer, sysadmin, or security practitioner. There’s no complex math or jargon: Modern cryptography methods are explored through clever graphics and real-world use cases. You’ll learn building blocks like hash functions and signatures; cryptographic protocols like HTTPS and secure messaging; and cutting-edge advances like post-quantum cryptography and cryptocurrencies. This book is a joy to read—and it might just save your bacon the next time you’re targeted by an adversary after your data. What's inside Implementing digital signatures and zero-knowledge proofs Specialized hardware for attacks and highly adversarial environments Identifying and fixing bad practices Choosing the right cryptographic tool for any problem About the reader For cryptography beginners with no previous experience in the field. About the author David Wong is a cryptography engineer. He is an active contributor to internet standards including Transport Layer Security. Table of Contents PART 1 PRIMITIVES: THE INGREDIENTS OF CRYPTOGRAPHY 1 Introduction 2 Hash functions 3 Message authentication codes 4 Authenticated encryption 5 Key exchanges 6 Asymmetric encryption and hybrid encryption 7 Signatures and zero-knowledge proofs 8 Randomness and secrets PART 2 PROTOCOLS: THE RECIPES OF CRYPTOGRAPHY 9 Secure transport 10 End-to-end encryption 11 User authentication 12 Crypto as in cryptocurrency? 13 Hardware cryptography 14 Post-quantum cryptography 15 Is this it? Next-generation cryptography 16 When and where cryptography fails

Download or read book Introduction to Cryptography written by Hans Delfs and published by Springer Science & Business Media. This book was released on 2007-03-05 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the rapid growth of digital communication and electronic data exchange, information security has become a crucial issue in industry, business, and administration. Modern cryptography provides essential techniques for securing information and protecting data. In the first part, this book covers the key concepts of cryptography on an undergraduate level, from encryption and digital signatures to cryptographic protocols. Essential techniques are demonstrated in protocols for key exchange, user identification, electronic elections and digital cash. In the second part, more advanced topics are addressed, such as the bit security of one-way functions and computationally perfect pseudorandom bit generators. The security of cryptographic schemes is a central topic. Typical examples of provably secure encryption and signature schemes and their security proofs are given. Though particular attention is given to the mathematical foundations, no special background in mathematics is presumed. The necessary algebra, number theory and probability theory are included in the appendix. Each chapter closes with a collection of exercises. The second edition contains corrections, revisions and new material, including a complete description of the AES, an extended section on cryptographic hash functions, a new section on random oracle proofs, and a new section on public-key encryption schemes that are provably secure against adaptively-chosen-ciphertext attacks.

Download or read book Secret Key Cryptography written by Frank Rubin and published by Simon and Schuster. This book was released on 2022-08-30 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore the fascinating and rich world of Secret Key cryptography! This book provides practical methods for encrypting messages, an interesting and entertaining historical perspective, and an incredible collection of ciphers and codes—including 30 unbreakable methods. In Secret Key Cryptography: Ciphers, from simple to unbreakable you will: Measure the strength of your ciphers and learn how to guarantee their security Construct and incorporate data-compression codes Generate true random numbers in bulk Construct huge primes and safe primes Add an undetectable backdoor to a cipher Defeat hypothetical ultracomputers that could be developed decades from now Construct 30 unbreakable ciphers Secret Key Cryptography gives you a toolbox of cryptographic techniques and Secret Key methods. The book’s simple, non-technical language is easy to understand and accessible for any reader, even without the advanced mathematics normally required for cryptography. You’ll learn how to create and solve ciphers, as well as how to measure their strength. As you go, you’ll explore both historic ciphers and groundbreaking new approaches—including a never-before-seen way to implement the uncrackable One-Time Pad algorithm. Whoever you are, this book is for you! History buffs will love seeing the evolution of sophisticated cryptographic methods, hobbyists will get a gentle introduction to cryptography, and engineers and computer scientists will learn the principles of constructing secure ciphers. Even professional cryptographers will find a range of new methods and concepts never published before. About the technology From the Roman empire’s Caesar cipher to the WWII Enigma machine, secret messages have influenced the course of history. Today, Secret Key cryptography is the backbone of all modern computing infrastructure. Properly designed, these algorithms are efficient and practical. Some are actually unbreakable, even using supercomputers or quantum technology! About the book Secret Key Cryptography teaches you how to create Secret Key ciphers, ranging from simple pen-and-paper methods to advanced techniques used in modern computer-based cryptography. It reveals both historic examples and current innovations. You’ll learn how to efficiently encrypt large files with fast stream ciphers, discover alternatives to AES encryption, and avoid strong-looking but weak ciphers. Simple language and fun-to-solve mini-ciphers make learning serious concepts easy and engaging. What's inside Construct 30 unbreakable ciphers Measure the strength of your ciphers and guarantee their security Add an undetectable backdoor to a cipher Defeat hypothetical ultracomputers of the future About the reader For professional engineers, computer scientists, and cryptography hobbyists. No advanced math knowledge is required. About the author Frank Rubin has been doing cryptography for over 50 years. He holds an MS in Mathematics, and a PhD in Computer Science. Table of Contents 1 Introduction 2 What is cryptography? 3 Preliminary concepts 4 Cryptographer’s toolbox 5 Substitution ciphers 6 Countermeasures 7 Transposition 8 Jefferson Wheel Cypher 9 Fractionation 10 Variable-length fractionation 11 Block ciphers 12 Principles for secure encryption 13 Stream ciphers 14 One-time pad 15 Matrix methods 16 Three pass protocol 17 Codes 18 Quantum computers

Download or read book The Modern Cryptography Cookbook written by Anish Nath and published by Anish Nath. This book was released on 2018-08-10 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learning cryptography and security is fun instead of saying it hard or Complex. This book have concepts, examples of Cryptography principle followed with Applied Cryptography. Chapters presented in this book are independent and can be read in any order. Most of the example utilizes openssl. In Summary you are going to learn and explore below topics URL Encode Decode, Base64 Encode Decode, ASCII string to hex, Convert ASCII to Hex, PEM Formats, Cryptography Algorithms, Symmetric Key cryptography, Authenticated encryption, Types of Asymmetric Key Algorithms, Quantum Breakable Algorithms, Quantum Secure Algorithms, Cryptography Algorithms, Symmetric Key cryptography, Block ciphers Modes of Operation, Authenticated encryption (both encryption and message integrity)Quantum Breakable AlgorithmsQuantum Secure AlgorithmsAES (Encryption/Decryption), DES (Encryption/Decryption), 3DES (Encryption/Decryption)BlowFish(Encryption/Decryption), RC4 (Encryption/Decryption)Assymtetric Key Cryptography, RSA (Encryption/Decryption), DSA (Keygen,Sign File,Verify Sig), PKI, TLS v1.3, ECDSA Key exchange, Diffie-Hellman, Message Digests, MAC (Message Authentication Codes), HMAC Generate HMAC, Secure Password Hashing bcrypt password hash PBKDF2 (PBE Encryption/Decryption)scrypt password hash Crypt hash functions and limitation, MD5 password generate Generate password for /etc/passwordCipher SuiteManaging Certificates.(Self Sign/rootCA, create ecc,rsa,dsa certificates)SMIMEGPG (Sign/verify/store,create Authentication Key )GnuPG for SSH authenticationHardening Modern Certificates & TLS ConfigurationNginx Secure Configuration ()Apache Secure ConfigurationHAProxy Secure ConfigurationAWS ELB Secure ConfigurationTesting HTTPS Services, Openssl HTTPS Testing, SSH Key Gen, Java Keytool/Keystore IPtables

Download or read book Public Key Cryptography PKC 2024 written by Qiang Tang and published by Springer Nature. This book was released on with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book SYMMETRIC KEY CRYPTOGRAPHY WITH PYTHON AND TKINTER written by Vivian Siahaan and published by BALIGE PUBLISHING. This book was released on 2024-08-24 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the evolving landscape of data security, encryption algorithms play a crucial role in safeguarding sensitive information. This book delves into several prominent encryption algorithms, including AES, DES, 3DES, Blowfish, and CAST. Each algorithm offers unique strengths and is suitable for different use cases. Advanced Encryption Standard (AES) stands out for its robust security and efficiency, making it a preferred choice for many modern applications. Data Encryption Standard (DES), while historically significant, has largely been replaced by Triple DES (3DES), which enhances DES's security by applying it multiple times. Blowfish, a versatile and fast cipher, and CAST, known for its flexibility in key lengths, are also explored for their practical applications in various security scenarios. To provide a hands-on approach, this book includes detailed Python examples and Tkinter-based graphical user interfaces for each encryption algorithm. These practical examples illustrate how to implement these ciphers in real-world applications, from basic encryption and decryption processes to more complex use cases involving secure data handling and user interaction. Through these examples, readers will gain a comprehensive understanding of both the theoretical and practical aspects of encryption, empowering them to implement secure solutions tailored to their specific needs. In chapter two, we discussed the development of a Tkinter-based GUI application for AES encryption and decryption of synthetic data. The application consists of multiple tabs: one for displaying original data, one for showing encrypted data, another for decrypted data, and a fourth for entering and managing passwords. Key functionalities include generating a synthetic dataset with various attributes like UserID, Name, and Email, encrypting and decrypting this data using AES encryption in GCM mode, and displaying the results in a ttk.Treeview. The application also features password management, allowing users to set a password, generate an encryption key from it, and update the displays accordingly. The code includes several methods for data encryption and decryption, key derivation, and DataFrame management. The generate_data_intelligence_dataset method creates synthetic data, while encrypt_data and decrypt_data methods handle AES encryption and decryption. The update_displays method updates the DataFrame with encrypted and decrypted data and saves these to Excel files. The display_dataframe method dynamically displays DataFrames in the Tkinter GUI, with alternating row colors for better readability. This session detailed how each part of the code contributes to creating a rich and interactive application for handling encrypted data. In chapter three, we explored a detailed Tkinter application designed for managing and visualizing Bitcoin transaction data. The application generates synthetic data including wallet addresses, transaction types, dates, Bitcoin amounts, and their USD equivalents. Users enter an 8-byte DES key to encrypt Bitcoin amounts using DES encryption. The encrypted data is displayed in a tab within the Tkinter GUI, and users can view a histogram showing the distribution of Bitcoin amounts, both before and after encryption. The application leverages various Python libraries: tkinter for the GUI, pandas for data manipulation, Crypto.Cipher.DES for encryption, and matplotlib for plotting. Key functions include generating synthetic Bitcoin data, encrypting data with DES, and visualizing data distributions. The GUI is structured with tabs for entering the password, viewing original and encrypted data, and displaying distribution graphs. The session detailed how each function works, from generating Bitcoin addresses and transaction data to encrypting and decrypting data and plotting results. In chapter four, we discussed a Python code that integrates a Tkinter GUI with Triple DES (3DES) encryption and SQLite database management. The code encompasses the setup of an SQLite database, encryption and decryption of transaction data using 3DES, and functions for saving and retrieving encrypted transaction records. Key functions include generating a 3DES key, encrypting and decrypting data with appropriate padding, and handling database operations with retry logic to manage potential locking issues. We explored the database setup with table creation, and transaction management, and incorporated robust error handling to ensure reliable operation. The GUI implementation leverages Tkinter for user interaction and display, including functions to generate 3DES keys, handle encryption/decryption operations, and manage transaction records in an SQLite database. The session covered detailed explanations of how each part of the code operates, from database setup and key generation to data encryption/decryption and transaction storage. This comprehensive approach ensures secure handling of sensitive data and integrates encryption functionalities within a user-friendly interface, demonstrating practical applications of cryptographic techniques in a real-world scenario. In chapter five, we detailed a Python script using Tkinter for a secure cloud storage application leveraging Blowfish encryption. The script includes several core functionalities: user authentication, file upload and download, and cryptographic operations. Key aspects include helper functions for generating and verifying HMACs, as well as Blowfish encryption and decryption. The GUI is organized into tabs for user login/register, file upload, file download, and logs. Functions are defined to handle file selection, encryption, upload, HMAC generation, and downloading, ensuring that data integrity is maintained through HMAC verification and secure file handling. The Tkinter-based GUI is designed to provide a user-friendly interface for interacting with the secure cloud storage system. The SecureCloudStorageApp class initializes and configures the GUI with tabs for different functionalities. It manages user login, registration, file selection, and storage operations. The application supports encryption and decryption of files, storing encrypted data and HMACs, and provides feedback through a log and message boxes. This setup ensures secure data handling and user management, integrating cryptographic functions seamlessly into a functional application interface. In chapter six, we discussed and refined a Python script for managing file encryption and decryption using the CAST cipher, implemented with a Tkinter graphical user interface (GUI). The script includes functions for generating encryption keys, encrypting and decrypting files, and handling file uploads and downloads. It also features user authentication and registration mechanisms, utilizing bcrypt for password hashing and checking. The GUI allows users to perform these actions through a series of buttons and input fields, with status updates and error messages displayed in a scrollable text area. We further improved the script by adding error handling for file operations and ensuring proper file path management. Enhancements included better user feedback through message boxes for errors related to file reading, JSON decoding, and user actions. These improvements aimed to make the application more robust and user-friendly, ensuring reliable file management and secure encryption practices. The final version also addressed exceptions and edge cases to enhance the overall reliability and functionality of the Tkinter-based application.

Download or read book Cryptography written by Douglas Robert Stinson and published by CRC Press. This book was released on 2018-08-14 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through three editions, Cryptography: Theory and Practice, has been embraced by instructors and students alike. It offers a comprehensive primer for the subject’s fundamentals while presenting the most current advances in cryptography. The authors offer comprehensive, in-depth treatment of the methods and protocols that are vital to safeguarding the seemingly infinite and increasing amount of information circulating around the world. Key Features of the Fourth Edition: New chapter on the exciting, emerging new area of post-quantum cryptography (Chapter 9). New high-level, nontechnical overview of the goals and tools of cryptography (Chapter 1). New mathematical appendix that summarizes definitions and main results on number theory and algebra (Appendix A). An expanded treatment of stream ciphers, including common design techniques along with coverage of Trivium. Interesting attacks on cryptosystems, including: padding oracle attack correlation attacks and algebraic attacks on stream ciphers attack on the DUAL-EC random bit generator that makes use of a trapdoor. A treatment of the sponge construction for hash functions and its use in the new SHA-3 hash standard. Methods of key distribution in sensor networks. The basics of visual cryptography, allowing a secure method to split a secret visual message into pieces (shares) that can later be combined to reconstruct the secret. The fundamental techniques cryptocurrencies, as used in Bitcoin and blockchain. The basics of the new methods employed in messaging protocols such as Signal, including deniability and Diffie-Hellman key ratcheting.

Download or read book Limitations and Future Applications of Quantum Cryptography written by Kumar, Neeraj and published by IGI Global. This book was released on 2020-12-18 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concept of quantum computing is based on two fundamental principles of quantum mechanics: superposition and entanglement. Instead of using bits, qubits are used in quantum computing, which is a key indicator in the high level of safety and security this type of cryptography ensures. If interfered with or eavesdropped in, qubits will delete or refuse to send, which keeps the information safe. This is vital in the current era where sensitive and important personal information can be digitally shared online. In computer networks, a large amount of data is transferred worldwide daily, including anything from military plans to a country’s sensitive information, and data breaches can be disastrous. This is where quantum cryptography comes into play. By not being dependent on computational power, it can easily replace classical cryptography. Limitations and Future Applications of Quantum Cryptography is a critical reference that provides knowledge on the basics of IoT infrastructure using quantum cryptography, the differences between classical and quantum cryptography, and the future aspects and developments in this field. The chapters cover themes that span from the usage of quantum cryptography in healthcare, to forensics, and more. While highlighting topics such as 5G networks, image processing, algorithms, and quantum machine learning, this book is ideally intended for security professionals, IoT developers, computer scientists, practitioners, researchers, academicians, and students interested in the most recent research on quantum computing.

Download or read book Visual Cryptography and Its Applications written by Jonathan Patrick Weir and published by Bookboon. This book was released on 2011 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CRYPTOGRAPHY AND NETWORK SECURITY written by Dr.M.RAMA MOORTHY and published by SK Research Group of Companies. This book was released on 2024-02-07 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr.M.RAMA MOORTHY, Professor, Department of Computer Science and Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India. Dr.CARMEL MARY BELINDA.M.J, Professor, Department of Computer Science and Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India. Dr.K.NATTAR KANNAN, Professor, Department of Computer Science and Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India. Dr.R.GNANAJEYARAMAN, Profesor, Department of Computer Science and Engineering, Saveetha School of Engineering, Saveetha Institute of Medical And Technical Sciences, Saveetha University, Chennai, India. Dr.U.ARUL, Professor, Department of Computer Science and Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India.

Download or read book CRYPTOGRAPHY AND NETWORK SECURITY PRINCIPLES AND PRACTICE written by Mr.B.TAMILARASAN and published by SK Research Group of Companies. This book was released on 2023-10-23 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mr.B.TAMILARASAN, Research Scholar, School of Mathematics, Madurai Kamaraj University, Madurai, Tamil Nadu, India. Dr.R.SRINIVASAN, Associate Professor, Department of Computer Science, SLS MAVMM Ayira Vaisyar College, Madurai, Tamil Nadu, India. Dr.S.DHIVYA, Assistant Professor, PG and Research Department of Mathematics, Kandaswami Kandars College, Velur, Namakkal, Tamil Nadu, India. Dr.E.K.SUBRAMANIAN, Associate Professor, Department of Computer Science & Engineering, Saveetha School of Engineering - SIMATS, Chennai, Tamil Nadu, India. Dr.C.GOVINDASAMY, Associate Professor, Department of Computer Science & Engineering, Saveetha School of Engineering - SIMATS, Chennai, Tamil Nadu, India.

Download or read book Everyday Cryptography written by Keith M. Martin and published by OUP Oxford. This book was released on 2012-02-29 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cryptography is a vital technology that underpins the security of information in computer networks. This book presents a comprehensive introduction to the role that cryptography plays in providing information security for technologies such as the Internet, mobile phones, payment cards, and wireless local area networks. Focusing on the fundamental principles that ground modern cryptography as they arise in modern applications, it avoids both an over-reliance on transient current technologies and over-whelming theoretical research. Everyday Cryptography is a self-contained and widely accessible introductory text. Almost no prior knowledge of mathematics is required since the book deliberately avoids the details of the mathematical techniques underpinning cryptographic mechanisms, though a short appendix is included for those looking for a deeper appreciation of some of the concepts involved. By the end of this book, the reader will not only be able to understand the practical issues concerned with the deployment of cryptographic mechanisms, including the management of cryptographic keys, but will also be able to interpret future developments in this fascinating and increasingly important area of technology.