With a market share of almost 70%, Java can be rightly called the programming language of the Web. Java security allows transmission of sensitive information, stores sensitive data, ensures that code is from a trusted source, and ensures that only authorized users have access to sensitive information. This book covers the Java Virtual Machine, Java 2 Security Manager, Security Tools, Digital Signatures, Firewalls, and more. It begins with the basics and then moves on to cover the intricacies of securing Java applications. It includes tips, quizzes, brain ticklers, and exercises as well as real-life examples to enable you to easily relate with situations in their environment. By using case studies, this book shows you how to ensure security in today's business scenarios.