Data Guard is a simple cryptography suite that helps you to encrypt and decrypt your data.
Just run program under JVM, enter your data, select your favorite encryption algorithm and RUN it!
Each algorithm that used in this program should extends CryptoAlgorithm class and added to CryptoConstants class.
If you want to use this project as a library, then you can import crypto.CryptoTools. There is many methods inside crypto.CryptoTools that you can call them from another programmes.