![]() ![]() Hence, you save considerable time and CPU cycles while hunting to the plaintext form of the passphrase. 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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