This project is a Python-based GUI application for encrypting and decrypting messages using AES encryption. It features a Tkinter-based interface for easy interaction and includes functionalities such as selecting key sizes, saving and loading encrypted messages, and displaying progress during encryption and decryption.

- AES Encryption and Decryption: Securely encrypt and decrypt messages.
- User-Friendly Interface: Designed with Tkinter for easy interaction.
- Key Size Selection: Options for 16, 24, 32-byte keys.
- Save and Load: Save encrypted messages to a file and load them when needed.
- Progress Indication: Visual feedback during encryption and decryption.
- Help Menu: Instructions on how to use the application.