This program allows users to encrypt and decrypt files using a custom password. It uses the cryptography library for secure encryption with AES-128 (Fernet) and a key derived from the password using PBKDF2-HMAC-SHA256.

• File encryption with a custom password
• File decryption if the correct password and salt are provided
• Simple GUI built with tkinter

Make sure you have the cryptography library installed:

pip install cryptography

Run the Python script to open the graphical user interface:

python encryptor.py

1. Enter a password in the text field.
2. Enter a custom salt (a string) in the corresponding text field.
3. Click the "Encrypt File" button.
4. Choose a file to encrypt.
5. A new file will be created with the .enc extension.

1. Enter the same password and salt used for encryption.
2. Click the "Decrypt File" button.
3. Choose an .enc file to decrypt.
4. The file will be decrypted and saved with _decrypted appended to the filename.

• Uses PBKDF2 to derive a secure key from the password.
• Protects against brute-force attacks with 100,000 iterations.
• Encrypts the file with AES-128 (Fernet) for confidentiality.

⚠️ Note: The program uses a fixed salt for key derivation. For better security, it would be preferable to generate a random salt for each file and store it with the encrypted file.

• Dynamic salt management to improve security.
• Enhanced protection against brute-force attacks.
• File authentication using HMAC for better data integrity.

This project is licensed under the MIT License.