How to Encrypt Files and Strings with Python? (Part 1 - Symmetric Encryption) - Paul Mahon

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In this video, you will learn how to encrypt and decrypt data and strings in Python.
This is Part I: Symmetric encryption with the cryptography library in Python.
For more information, visit us on:
- github.com/pmahon2016/symmetric_encryption.git


in this video we're going to talk about encryption which is really important today when
managing certain data and thankfully
there are libraries available for python
to handle encryption so in this video,
we're going to learn how to encrypt text
and files in python. First, a quick
primer on encryption. In general before
we begin there are basically three types
of encryption; symmetric encryption has a
single key that is shared between two or
more people think of the key is the
password. Symmetric encryption is great
for encrypting files and large amounts
of data quickly. Asymmetric encryption
has two keys; a public and a private key
and there's a relationship between the
two keys that allow you to encrypt with one key
and decrypt with the other. This is
ideal for transmitting data or, when
managing keys is difficult. Finally,
there's a one-way hash which does not use keys - it only encrypts and does not
decrypt. So then, each type of encryption
specializes in a particular function but
they are often used together in the
cipher suite in this video we're only
going to look at symmetric encryption
with the Python encryption library. We will look at the other types in future videos from this series