Python encrypt binary file

Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. What's New. Most popular in Python. More related articles in Python. We use cookies to ensure you have the best browsing experience on our website. Start Your Coding Journey Now! Login Register. You didn't specify, but your code makes it look like you're using ECB mode. Here's a short example of code I wrote for the cryptopals challenge, slightly modified to better fit your sample code.

Make sure your key is 16 bytes long. Also, the plain text must be a multiple of 16 bytes. Another one of the challenges has you implementing a padding function. Another thing to note is that after encrypting your data, the safest way to store that is in some sort of encoding, usually Base64 is used. Then when you go to decrypt it, you base64 decode the data first. What you might be looking for is the xor bitwise operator in python.

Basically it takes every pair of bits in two numbers and returns 1 only and only if one of the bits is 1, otherwise it returns 0. You might also want to check out simple-crypt which abstracts aways some of the tedious work in using PyCrypto.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? The fernet module of the cryptography package has inbuilt functions for the generation of the key, encryption of plain text into cipher text, and decryption of cipher text into plain text using the encrypt and decrypt methods respectively.

The fernet module guarantees that data encrypted using it cannot be further manipulated or read without the key. We are going to use the nba. Installation: The cryptography library can be installed using the below command: pip install cryptography Generate Key to encrypt the file In the cryptography library, there is a cryptography algorithm called fernet.

We will use the fernet module to encrypt the file. The file will contain one line, which is a string acting as a key i. Now write code to encrypt this file: Open the file that contains the key. Initialize the Fernet object and store it in the fernet variable. Read the original file.

Encrypt the file and store it into an object. Then write the encrypted data into the same file nba. Python3 opening the key with open 'filekey. Skip to content.