Java Encryption Application

This Java application provides functionalities for various encryption operations including hashing, DES encryption and decryption, AES encryption and decryption, and RSA encryption and decryption. It offers a menu-driven interface for ease of use.

Features:

• Hashing: SHA-256 hashing of input strings.
• DES Encryption and Decryption: Encrypts and decrypts input strings using the Data Encryption Standard (DES) algorithm.
• AES Encryption and Decryption: Encrypts and decrypts input strings using the Advanced Encryption Standard (AES) algorithm.
• RSA Encryption and Decryption: Encrypts and decrypts input strings using the Rivest-Shamir-Adleman (RSA) algorithm.
• Key Generation: Generates DES and RSA key pairs of specified lengths.

Usage:

1. Clone the repository to your local machine.
2. Ensure you have Java installed.
3. Compile the source files using the following command:

   javac App.java

4. Run the compiled program using the following command:

   java App

5. Follow the on-screen instructions to perform encryption and decryption operations.

Note:

• Ensure proper input validation and error handling for robust usage.
• It's recommended to use more secure encryption modes such as CBC or GCM instead of ECB for real-world applications.
• This application serves as a demonstration of basic encryption techniques and may not be suitable for production use without further enhancements.

License:

This project is licensed under the MIT License - see the LICENSE file for details.