Kali Linux comes with RainbowCrack already installed, but if you don't have it or are running on Windows, you can download it or use aptitude if you are on a Debian-based distro like Mint. We'll be using RainbowCrack to create and sort our tables. I will also include some information for those on the Windows platform. However, before we can do that, we must learn how to make a rainbow table.įor this guide, I'll be demonstrating from a base of Kali Linux running in a virtual machine, but the instructions for most Linux distros will be basically the same. Should we ever come across this hash, we can search our table, find it, and learn what the original string was. Going back to rainbow tables, we should have an entry saying password on one side and 5F4DCC3B5AA765D61D8327DEB882CF99 on the other. While MD5 may be being replaced by stronger hashing methods such as bcrypt, it's still commonly used on LAMP stacks across the internet today. What that means is that you can take a raw text input, say the string password, and run a hashing algorithm on it such as MD5 to get an output of 5F4DCC3B5AA765D61D8327DEB882CF99. ![]() A hash is a method of cryptography that is very cheap to calculate in one direction but very expensive to calculate in the opposite direction. Passwords on the internet are almost always stored hashed. ![]() What is a hash and why would you want to know what random combinations of characters are hashed into? ![]() A rainbow table can be thought of like a dictionary, except instead of words and their definitions, it holds combinations of characters on one side and their hashed form on the other.
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