File Encryption and Decryption using Fernet

Overview

This Python script provides a basic example of file encryption and decryption using the Fernet symmetric key encryption algorithm from the cryptography library.

Prerequisites

Make sure you have Python installed on your system.

pip install cryptography

Usage

1. Run the script

python main.py

2. Generate a Key: The generated key will be saved to a file named encrypted_key.key.

3. Encrypt a File: Replace something.txt with the path to the file you want to encrypt. The encrypted file will be saved as encrypted_file.txt.

4. Decrypt a File: After encryption, you can decrypt the file using the same key. The decrypted file will be saved as decrypted_file.txt.

File Structure

• main.py: The main Python script containing functions for key generation, key saving/loading, file encryption, and file decryption.
• encrypted_key.key: The file containing the generated encryption key.
• something.txt: The input file you want to encrypt.
• encrypted_file.txt: The encrypted output file.
• decrypted_file.txt: The decrypted output file.