If you have got password protected rar or zip file and you forgot password for that, how would you extract the contents of the file? Truth be told, there is no known confirmed method to extract the password from the compressed file. The only available methods are “Brute Force” and “dictionary-based attacks“. ‘Brute Force’ and ‘Dictionary Attacks’ to break the password of archives consume a lot of time and PC resources. Brute Force and Dictionary Attack are powerful but not 100% reliable. It will take a lot of time to break a really strong password. In case you want to try anyway, we have some free and open source password recovery and password cracker tools to recommend you which will let you break passwords of archives, rar or zip files.
Password complexity is important because it makes password strong. A strong password takes 1.8 million years to be hacked if hacker use brute force attacks. For brute force attacks, assuming 10,000 password attempts per second, the length and character set of the passwords can make a big difference. You should use atleast 9 characters long password containing uppercase, lowercase, digits and punctuation. That password will be so strong that it can not be hacked in one million years of continuous brute force attempts according to the following table.