We currently have a large number of repositories on GitHub with text files with a large number of passwords that we can test. We must bear in mind that this tool generates a dictionary with all the characters, generally a person puts an easy to remember WiFi password, and not a password that is almost random, so resorting to word dictionaries is a great decision. Crunch will allow us to configure the dictionary as we want, and it will export it to a text file for later use in programs such as Aircrack-ng among others. This way, we won’t have to use dictionaries that are outside of these parameters. If we know or intuit that the WPA password of a target has, for example, 10 characters and that it only uses uppercase and lowercase letters, we can create a dictionary that has all the combinations and permutations of uppercase and lowercase letters. We must remember that WiFi networks with WPA have between 8 and 63 characters, so “trying” these words does not make any sense, since we will not be able to “hit” with the WiFi password.Ĭurrently there are very powerful and configurable programs that allow us to create a dictionary on demand, such as Crunch. When we download a dictionary of keys, if we want to crack WiFi wireless networks, we must make sure that we do not have words or a combination of words and numbers below 8 characters or above 63 characters.

Having a good dictionary of keys is essential to be able to “hit” the password, it is very important that it has millions of words and also combinations of the most common that a human could put as a password. Generally we can find dictionaries of millions of words that occupy several tens of GB in size, the computer will have to try each of these words or combination of words one by one, until we find the correct password or until the dictionary that we are finished is finished. Use these dictionaries with Aircrack-ng What is a dictionary attack?Ī dictionary attack on a password, either on a system or on a WiFi network, consists of testing all the words that are contained in a text file.

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