Fuzz Testing - Attack your programs before someone else does

Fuzz testing is a simple technique that can have a profound effect on your code quality. In this article, Elliotte Rusty Harold shows what happens when he deliberately injects random bad data into an application to see what breaks. He also explains how to use defensive coding techniques such as checksums, XML data storage, and code verification to harden your programs against random data. He concludes with an exercise in thinking like a code cracker -- a crucial technique for defending your code.