Python File Encryptor

A simple and secure file encryption tool written in Python using AES-256-GCM with random key generation.

Features

• AES-256-GCM encryption
• Random 256-bit key generation for each encryption
• Random nonce for each encryption
• Encrypted file and key file saved separately
• Works with any file type (txt, jpg, pdf, mp4, etc.)

Installation

pip install cryptography

Or use requirements.txt:

pip install -r requirements.txt

Usage

Encrypt a file

from encryptor import encrypt_file

enc_file, key_file = encrypt_file( input_file_path="/path/to/your/file.txt", output_dir="/path/to/output/" ) print("Encrypted file:", enc_file) print("Key file:", key_file)

Decrypt a file

from encryptor import decrypt_file

decrypt_file( encrypted_file_path="/path/to/output/file.txt.enc", key_file_path="/path/to/output/file.txt.key", output_path="/path/to/decrypted.txt" ) print("Decrypted successfully!")

Output Files

After encryption, two files are created:

• file.txt.enc - The encrypted file (contains nonce + ciphertext)
• file.txt.key - The encryption key (32 bytes, keep it safe!)

Security Notes

• Keep the .key file safe! Without it, files cannot be recovered.
• Store the .key file separately from the .enc file.
• Delete the original file after encryption.

Important: Change the Paths!

Before running the program, you MUST change the file paths in the code to match your system.

Windows paths:

input_file_path = r"C:\Users\YourName\Desktop\secret.txt" output_dir = r"C:\Users\YourName\Desktop\Folder"

Linux/Mac paths:

input_file_path = "/home/username/Desktop/secret.txt" output_dir = "/home/username/Desktop/Folder"

License

MIT License