![]() So once you have a rainbow table, all you need to do is ‘compare’ the hash in the rainbow table to the password hash you have obtained during penetration testing. Rainbow tables are ‘pre-computed hashes’. Basically, during a brute force attack, a lot of time and CPU power is wasted in computing the hashes. Then we can compare this hash with the password hash and if there is a match, we know that this plaintext is the passphrase. For this reason, during a brute force attack, we take a potential passphrase (in plaintext) and convert it to its hash form. So we can’t convert the password hashes back to their corresponding plaintext forms. As you know, a hash is a one way function and cannot be reversed. This makes the process of brute force cracking faster.Īt this point, it is essential that you understand the importance of rainbow tables in a brute force attack. Perhaps the main attraction of using this tool is its ability to deploy rainbow tables while cracking the password. ![]() Ophcrack is GUI tool that can be used for the purpose of cracking password hashes.
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