Symmetric Encryption

tags

Security

Summary #

Encryption is the process of changing readable data (also referred to as “plaintext”) into a form that can be read only by the intended receiver. To decipher the message, the receiver of the encrypted data must have the proper decryption key. In traditional encryption schemes, the sender and the receiver use the same key to encrypt and decrypt data – this is a type of encryption known as symmetric encryption.

Tools #

Fernet #

Fernet guarantees that a message encrypted using it cannot be manipulated or read without the key. Fernet is an implementation of symmetric (also known as “secret key”) authenticated cryptography. Fernet also has support for implementing key rotation via MultiFernet.

ref, python crytography

from cryptography.fernet import Fernet
key = Fernet.generate_key()
f = Fernet(key)
token = f.encrypt(b"my deep dark secret")
token
b'...'
f.decrypt(token)
b'my deep dark secret'