Crackme

A crackme ( is a small program designed to test a programmers reverse engineering skills.

They are created to have a legal way to "crack" software.

Other websites

• crackmes.de - A great site for testing your reversing skills. Crackmes range from Very Easy to Very Hard [1-9] for many Operating systems
• phmaster.info - Polish site with a lots of task. You can find many crackme's.