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Java Cryptography (Java Series) (Paperback)

by Jonathan Knudsen (Author)

4.0 out of 5 stars See all reviews (3 customer reviews)

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Product details

Paperback: 362 pages
Publisher: O'Reilly Media, Inc. (1 May 1998)
Language English
ISBN-10: 1565924029
ISBN-13: 978-1565924024
Product Dimensions: 23.4 x 17.8 x 1.9 cm

Average Customer Review: 4.0 out of 5 stars See all reviews (3 customer reviews)

Amazon.co.uk Sales Rank: 532,240 in Books (See Bestsellers in Books)
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#31 in Books > Computing & Internet > Computer Science > Security > Cryptography

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Product Description

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 Creating signed applets Covers JDK 1.2 and JCE 1.2.

About the Author

Jonathan Knudsen is an author at O'Reilly & Associates. His books include The Unofficial Guide to Lego Mindstorms Robots, Java 2D Graphics, and Java Cryptography. He is the Courseware Writer for LearningPatterns.com.

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1 of 1 people found the following review helpful:

4.0 out of 5 stars One of the best books on the subject, 22 Jan 2003

By	Thomas Paul (Plainview, NY USA) - See all my reviews (TOP 500 REVIEWER) (REAL NAME)

Are you concerned about someone outside your company intercepting a password between your applet and your server? Are you worried about someone inside your company using a packet sniffer to capture the credit card numbers of your customers? No? Well, perhaps you should be! As a first step towards closing your security holes you should pick up a copy of "Java Cryptography". This book is written for the experienced Java developer with no cryptography background who needs to build cryptography into their application. The book starts off with a brief description of secure systems and demonstrates a "Hello zoT1WY1NJA0=!" program. It then gives a fairly detailed description of cryptographic concepts and the Java Cryptography Architecture (JCA). Subsequent chapters discuss how to use the Java Cryptography Extension (JCE). Chapter 5 covers generating and managing symmetric and asymmetric keys with an explanation of the difference. Chapter 6 discusses authenticating users and messages. Signatures and certificates are covered. Chapter 7 covers encryption techniques using different types of ciphers. Chapter 8 covers signing applets. The last chapters include sample encrypted chat and e-mail programs. The end result is a book that provides excellent coverage of cryptography in Java. The only defect in the book is that it is three years old (Java 2 was in beta). Fortunately, the book was written recently enough to include the new utilities used in Java 2. Even though a new edition is desirable, "Java Cryptography" still stands alone as the best book available on this topic.

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1 of 1 people found the following review helpful:

4.0 out of 5 stars Great introduction to implementing cryptography in Java2, 9 Dec 2000

By A Customer

While a bit outdated with JCE 1.2.1 and Java2 v1.3.0 out, this is still the ultimate resource for learning to understand the Java Cryptography Architecture (JCA) and how to use the Java Cryptography Extension (JCE) v1.2 (and thus also the newer internationally exportable JCE v1.2.1).

If you have any interest at all in implementing cryptography in your Java programs this book is a great way to learn the basics. If you want to implement your own cryptographic provider for the JCE framework, this book is a must, as it includes a full working example of a provider for JCE v1.2 which is easily extendable to JCE v1.2.1.

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4.0 out of 5 stars Review of Java Cryptography, 10 Jul 2002

By	Mr. Michael Carty - See all my reviews

Java Cryptography is an excellent book for people with little expierence coding in Java, however it does presum that you know the basics. It explains the concepts of cryptography well and porvides excellent easy to understand examples. Most lines of code are also explained well. A real bargin.

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