Dictionary Attack Word List
Dictionary Attack This repository contains a simple example of a dictionary attack coded in Java. Description of Repository Content Here are the files you can find in this repository: • password.txt contains a list of passwords that we recover using the attack • DictionaryAttack.java is the source code for the attack • english.0 is the dictionary used during the attack to recover passwords Description of the password.txt file format The list of passwords that we recover using the attack is a text file in which each line contains a user account name followed by a password. There are two possible line formats: the first one contains an unsalted password while the second contains a salted password along with the salt. Username 0 unsaltedpassword username 1 salt saltedpassword The passwords are hashed using SHA-1 (see attack source code for implementation in the Java Cryptography Extension). When a salt is used, it is simply concatenated together with the passwords as follows: salt password. Description of the attack The attack simply reads the dictionary line by line and computes 6 different possible hashed passwords for the word contained in each line. These 6 possible hashes are compared to each of the passwords contained in the password.txt file for a match.
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If there is a match, we recovered a password. If not, we simply keep reading the dictionary line by line. The 6 possible hashes computed for each word from the dictionary are: • SHA1(word) • SHA1(drow) (reversed word) • SHA1(wrd) (word without vowels) • SHA1(salt word) (salted word) • SHA1(salt drow) (salted reversed word) • SHA1(salt wrd) (salted word without vowels) Note that the salts used in salted hashes are the ones includes in the password.txt file.
How to run the attack To run the attack, simply compile and run the DictionaryAttack.java file. All paths are hardcoded in the file so you will need to update them before you compile the source code. The output should be the following: Let's get things started. Joe's password is 'December' alice's password is 'tfosorciM' mary's password is 'Monday' john's password is 'brosba' bob's password is 'yllacitebahpla' guy's password is 'ntrstwrthnss' nick's password is 'uplifting' adam's password is 'vsblts' eve's password is 'wrrsm' andrew's password is 'kcitsdray' The program terminated. Note on complexity Note that this attack is a simple example and could be made far more efficient using various strategies.
Dictionary Attack Word List Download
One of them would be to precompute the possible hashes before checking the password list for matches. Since our password list and dictionary are fairly small in this example, I did not implement this feature.
Dictionary Attack Word List
I'm taking a security class in school, and we have to implement a custom cipher and crack some supplied ciphertext using a dictionary attack. I have wordlists that I've used before, but they don't have the permutations included. For example the word 'password' is in my wordlist, but 'password1', 'password2', 'password12' etc is not. Free portable oxford dictionary download full version for window 7.