This book is based on Java 2 Standard Edition, version 1.3 (alternately called simply 1.3). The security model of the Java 2 platform is radically different from the model of Java 1. Many basic security interfaces such as the access controller were introduced in Java 2, and other APIs went through significant changes between Java 1.1 and Java 2. On the other hand, there were few changes between Java 2 version 1.2 and 1.3; most of the information we discuss is applicable to 1.2 as well.
We also discuss three Java extensions in this book: version 1.2.1 of the Java Cryptography Extension, version 1.0.2 of the Java Secure Sockets Extension, and version 1.0 of the Java Authentication and Authorization Service. These extensions all rely on version 1.3 of the Java 2 platform.
Code examples used in this book are available from the O’Reilly web site located at http://www.oreilly.com/catalog/javasec2/.
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