Cryptography, the science of secret writing, is the biggest, baddest security tool in the application programmer's arsenal. Cryptography provides three services that are crucial in secure programming. These include a cryptographic cipher that protects the secrecy of your data; cryptographic certificates, which prove identity (authentication); and digital signatures, which ensure your data has not been damaged or tampered with. This book covers cryptographic programming in Java. Java 1.1 and Java 1.2 provide extensive support for cryptography with an elegant architecture, the Java Cryptography Architecture (JCA). Another set of classes, the Java Cryptography Extension (JCE), provides additional cryptographic functionality. This book covers the JCA and the JCE from top to bottom, describing the use of the cryptographic classes as well as their innards. The book is designed for moderately experienced Java programmers who want to learn how to build cryptography into their applications. No prior knowledge of cryptography is assumed. The book is peppered with useful examples, ranging from simple demonstrations in the first chapter to full-blown applications in later chapters.
Topics include: * The Java Cryptography Architecture (JCA) * The Java Cryptography Extension (JCE) * Cryptographic providers * The Sun key management tools * Message digests, digital signatures, and certificates (X509v3) * Block and stream ciphers * Implementations of the ElGamal signature and cipher algorithms * A network talk application that encrypts all data sent over the network * An email application that encrypts its messages Covers JDK 1.2 and JCE 1.2.
John Zukowski is a consulting computer programmer, trainer, and speaker. John has been working with Java since the late alpha stages of the language. He has been a Java instructor since those early days, teaching a variety of Java classes of different lengths and styles. John founded the Mid-Atlantic Java User Group (MAJUG) and coordinated it until he moved out of the area. Pre-Java, John was a C/C++/X-Windows/Database/Network programmer for Rapid Systems Solutions, a Maryland-based consulting firm. He has a computer science master's degree from The Johns Hopkins University, with undergraduate degrees in math and computer science from Northeastern University.
Preface. 1. Introduction Secure Systems Cryptography Platform Security Astute Inequalities Hello, zoT1wy1njA0=! 2. Concepts Confidentiality Integrity Authentication Random Numbers Algorithms. 3. Architecture Alphabet Soup Concept Classes API and SPI Factory Methods Standard Names The Provider Architecture Key Management Summary. 4. Random Numbers SecureRandom Self-Seeding Keyboard Timing SeederDialog. 5. Key Management Keys Key Generators Key Translators Key Agreement The Identity Key Management Paradigm The KeyStore Key Management Paradigm. 6. Authentication Message Digests MACs Signatures Certificates. 7. Encryption Streams and Blocks Block Ciphers Algorithms javax.crypto.Cipher Cipher's Close Relatives Passphrase Encryption Inside Cipher Hybrid Systems. 8. Signed Applets Renegade HotJava Navigator Internet Explorer Summary. 9. Writing a Provider Getting Started Adding the ElGamal Classes ElGamal Generating Keys Signature Cipher. 10. SafeTalk Using SafeTalk Under the Hood. 11. CipherMail Using CipherMail Under the Hood. 12. Outside the Box Application Design Decompilers and Bytecode Obfuscation Endpoint Security File Security Network Security Summary A. BigInteger B. Base64 C. JAR D. Javakey E. Quick Reference Index
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