Java Cryptography, Paperback by Knudsen, Jonathan, ISBN 1565924029, ISBN-13 9781565924024, Brand New, Free shipping in the US “Java Cryptology” teaches you how to write secure programs using Java’s cryptographic tools. It thoroughly discusses the Java security package and the Java Cryptography Extensions (JCE), showing you how to use security providers and even how to implement your own provider. If you work with sensitive data, you’ll find this book indispensable.