This is a Ruby implementation of DES (with ECB and CBC block chaining) by me and Steve Cirner (scirner22) for our Network Security class.

Here's a little breakdown of each file:

• additions.rb This file adds methods to Ruby.s builtin Array, Integer, and String classes that we use in our other classes.

• bruteforce.rb
  This file contains classes that perform brute force attacks against ciphertext that was encrypted using DES-CBC or DES-ECB.

• cbc.rb
  This file contains the CBC class that implements DES-CBC.

• des.rb
  This file contains the class that performs DES encryption/decryption on a single 64-bit block of data.

• ebc.rb
  This file contains the ECB class that implements DES-ECB.

• english-words.all
  This is the word list file used for brute force.

• test.rb This is the test harness class. Run this file to try to attempt a brute force.