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JavaBoutique: Articles: Programmers:

Contents
Introduction
Sample Code
In Conclusion

Java Jive: "I Said a Sip, Not the Whole Cup!"

by Scott Clark

Imagine how a programmer feels when they see their hard work displayed on someone else's Web page, without permission or credit.

Creating a Java applet may take a skilled programmer days, weeks, even months. After the applet has been deployed on the Web, imagine how a programmer feels when they see their hard work displayed on someone else's Web page, without permission or credit.

The theft of applets on the Web is a serious issue to many people. The methods are many: applets can be snagged from a Web browser's cache, or they can be simply linked to the thief's site, using the thief's own parameters. Some clever hackers simply reverse engineer the class file, and rebuild the applet. There's even a new utility program out that reverse engineers .class files into a readable source code.

If you have an applet on the Web, and don't believe anyone else is using it, just go to AltaVista and type in "applet:myapplet.class," (substituting your applet's class name for myapplet.class, of course). More likely than not, you'll see that your applet is being used on sites of which you had no knowledge. For a lot of folks, that's just a great compliment. For professional programmers, however, it's a crime. In this article, Web Developer® will show you one way which you can use to prevent applet theft from happening, and tell you the facts about Java applet theft.

One thing must always be kept in mind when it comes to security on the Internet-hackers enjoy breaking it! Most of the time, the actual information or software that hackers work so hard to get to isn't really the motivation. It's the mere act of breaking your security that motivates a lot of hackers.

Although corporate hackers are out there, when you are talking about Web pages and Java applets, more often than not, the hackers are other Web developers, and the majority of them have Web pages, which is where you'll find your "stolen" applet.

NEXT


Reprinted from Web Developer® magazine, Vol. 3 No.2 Mar/Apr 1997 (c) 1997 internet.com Corporation. All rights reserved.


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