USB Work - Triple DES File Encryption and Decryption

This is a simple Windows Forms application built in C# that demonstrates the use of Triple DES (3DES) encryption and decryption on files. It allows the user to drag and drop a file, then encrypt or decrypt it using a series of password prompts.

Features

• Drag and Drop: Drag and drop a file to encrypt or decrypt.
• Triple DES Encryption: Encrypt files using three different passwords in a three-step process with Triple DES encryption.
• Decryption: Decrypt files using the same three passwords, reversing the encryption steps.
• Password Prompts: Users are prompted to enter three different passwords for encryption and decryption.
• File Output: Encrypted files are saved with an .enc extension, while decrypted files are saved with .dec.

How to Use

1. Clone the repository:

   git clone https://github.com/Azaki21421/DES-EDE3.git
   

2. Build the application: Open the project in Visual Studio and build it. (or skip and just run app from release)

3. Run the application:

• Launch the application.
• Drag and drop a file onto the form.
• Click the "Encrypt" button to encrypt the file.
• Click the "Decrypt" button to decrypt the file.
• Enter the required passwords when prompted.

4. Encryption:

• The program will ask for three passwords for encryption.
• The file will be encrypted and saved with a .enc extension.

5. Decryption:

• The program will ask for the same three passwords for decryption.
• The file will be decrypted and saved with a .dec extension.

6. Passwords

• The application uses three passwords for encryption and decryption. The passwords are used to generate keys with SHA256 and then truncated to 24 bytes for the Triple DES algorithm.

Dependencies

• .NET Framework (Windows Forms)