Symmetric Crypto with PyCrypto, Part 3

Now that we have a grasp on how encryption works (from a high-level black box perspective, at least), we concern ourselves with how to generate cryptographically strong keys. I highly recommend reading Part 1 and Part 2 first.

Symmetric Encryption with PyCrypto, Part 2

This is the second part of my introductory series on cryptography in Python and it covers the AES block cipher with lots of actual code this time. Please read the first part if you're new to this stuff. I consider these articles to be works in progress so don't be surprised if you notice something change between visits. I appreciate feedback and suggestions!

Symmetric Encryption with PyCrypto, Part I

This is a multi-part series on the basics of implementing symmetric cryptography in Python with PyCrypto. By the end of the series, we'll have a program that takes a password plus a file and outputs the encrypted version of the file. (And of course, the reverse.) This first part is mainly intended for the novice. Those already well-versed in encryption or don't care for a refresher should consider skipping to Part 2. Also, I'll attempt to explain concepts as best I can, but you'll want to have a decent grasp of Python in order to make full use of the tutorial.