40 Algorithms Every Programmer Should Know

Coding Symmetric Encryption

We will use Python's cryptography package, in this section, to demonstrate symmetric encryption. It is a comprehensive package that implements many cryptographic algorithms, such as symmetric ciphers and different message digests. When using it for the first time, we first need to install it using the pip command:

!pip install cryptography

Once installed, we can now use the package to implement symmetric encryption, as follows:

1. First, let's import the packages we need:

import cryptography as cryptfrom cryptography.fernet import Fernet

2. Let's generate the key:

3. Now, let's open the key:

file = open('mykey.key', ...