from the doc: 'This program (Advanced ARJ Password Recovery, or simply AAPR) can be used to recover your lost password for ARJ archive. At the moment, there is no known method to extract the password from the compressed file; so, the only available methods are "brute force" and dictionary-based attacks.Well, there are a lot of programs like this around, but all of them have their own "pros" and "cons". Here is a brief list of AAPR advantages:- The program is very fast: about 2 million passwords per second (Pentium II). - The program is customizable: you can set the password length (or length range), the character set to be used to generate the passwords, and a couple of other options. - Dictionary-based attack is available. - The maximum password length is not limited (in registered version). - No special virtual memory requirements.'