Data Encryption Standard (DES) algorithm

The Data Encryption Standard is a symmetric-key algorithm for the encryption of electronic data.

This project is my implementation of DES standart.

Algorithm

wiki

Usage

$ make
$ ./des
Usage:
	<input_file> { -e | -d } <output_file> { -g }

Encryption:

    ./des grummy.jpeg -e enc

Decryption:

    ./des enc -d dec.jpeg