The following review written by one of the Software Informer contributors applies to version 8.3
RAR Key is a key finder for your locked RAR archived files. RAR archives are in fact a compressed file which is compressed in the RAR format and may contain one or more files and folders.
RAR have capability to password protect your RAR archives and it can also encrypt your sensitive files in RAR format. But RAR Key is a utility for recovering the password of password protected RAR archives. It can also decrypt any encrypted RAR files. It is supporting all versions of the RAR. But RAR Key is very slow to recover password of RAR archive created by RAR 3.x version. Well, the speed on other versions is better. It comes with three types of password attacking techniques which include Brute-Force, Xieve and Dictionary attacks. All these techniques have their own advantages and disadvantages. Brute-Force attack has a limit of maximum of 8 characters it can check all passwords of up to 8 character long. And with Xieve attack technique you can recover passwords of up to 10 characters long n it is much faster then Brute-Force. But with Dictionary attack you can recover password of any length and it is also fast. Its user interface is very easy on eyes and any novice user can use it easily.