deo7 / filencrypt

File encryption and decryption using AES-256 CBC Mode

Filencrypt v4.0 💖

Filencrypt is a cryptography project started in 2021 that encrypts and decrypts your files of all extensions (txt, js, png...) in AES-256 CBC Mode. Filencrypt works with a password chosen by the user and with an initialization vector (IV) generated by the program.

Use 💻

Installation

git clone https://github.com/deo7/Filencrypt.git
cd Filencrypt
pip install -r requirements.txt

Run

Windows :

python filencrypt.py [-h] [-e] [-d] [-i] [-c]

Linux :

python3 filencrypt.py [-h] [-e] [-d] [-i] [-c]

Demonstartion 📸

As you can see above, I encrypt a 'test.txt' file with the password 'Filencrypt'. Thus, the original content of this file become encrypted and unreadable.
The program creates a file 'AES_IV.txt' containing the initialization vector (IV) used for the AES encryption of THIS file (and only this file, a file encryption -> a new IV generated). The IV is a 128 byte block uses by AES-256 CBC Mode for encryption.
AES_IV.txt file :

Finally, I decrypt my file with the password AND initialization vector (see below).

• WARNING : If you decrypt your file with an incorrect password / IV, you will get errors and incorrect decryption.

To conclude, here is a table that resume the encryption and the decryption of 'test.txt' :

Original file content	Encrypted file content (with my password and my IV)	Decrypted file content
Hello world !	ßCå2µ�Ä£Ë�ÅPð	Hello world !

Other 📚