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Any private key value that you enter or we generate is not stored on this site, this tool is provided via an HTTPS URL to ensure that private keys cannot be stolen, for extra security run this software on your network, no cloud dependency
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Fernet guarantees that a message encrypted using it cannot be manipulated or read without the key. All encryption in this version is done with AES 128 in CBC mode.
A fernet key is the base64url encoding of the following fields:
Signing-key || Encryption-key
A fernet token is the base64url encoding of the concatenation of the following fields:
Version || Timestamp || IV || Ciphertext || HMAC
Version || Timestamp || IV || Ciphertext
fernet python example
>>> from cryptography.fernet import Fernet
>>> key = Fernet.generate_key()
>>> key
'Qk_GF82vx2qPBiF91n238Mp5HeAlgYpC90NB9PGEB_0='
>>> f = Fernet(key)
>>> token = f.encrypt(b"Hello 8gwifi.org")
>>> token
'gAAAAABf1ecawfmsxp0S80m5LxV4md9Vf4lO7N-P9jQ08de_oLb5382Aqf7aGEof23E6N0WYPyhJkvhT1dDJJU4tdAFAhqnK-uiOoSu1T5P6XZLPcU90Rn0='
>>> f.decrypt(token)
'Hello 8gwifi.org'
>>>
Using password with Fernet
>>> import base64
>>> import os
>>> from cryptography.fernet import Fernet
>>> from cryptography.hazmat.primitives import hashes
>>> from cryptography.hazmat.backends import default_backend
>>> from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
>>> password = b"password"
>>> salt = os.urandom(16)
>>> kdf = PBKDF2HMAC(
... algorithm=hashes.SHA256(),
... length=32,
... salt=salt,
... iterations=100000,
... backend=default_backend()
... )
>>> key = base64.urlsafe_b64encode(kdf.derive(password))
>>> key
'XuRrdEYerPl07JKzRuVhkcx7zuUTtaS0L12-Bs89gbY='
>>> f = Fernet(key)
>>> token = f.encrypt(b"Hello 8gwifi.org")
>>> token
'gAAAAABf1ekGtfc1S8_LgphBOmTs5YHt14vCEv2Q7XUoRHxHmsQeCSDE6bfQgyv7dk4YZQGvB5VRwCAO5CT6gm_r8PtYFdIaEjsBNAFovx7L_W2SrguCYdY='
>>> f.decrypt(token)
'Hello 8gwifi.org'
Fernet is ideal for encrypting data that easily fits in memory. As a design feature it does not expose unauthenticated bytes. This means that the complete message contents must be available in memory, making Fernet generally unsuitable for very large files at this time