This code is public domain. Improved ARC4 (IARC4) contains a number of improvements over naive ARC4:

• Takes a nonce alongside the key. They are padded, XOR'd, and hashed to produce a new key.
• Drops the first 4096 iterations of the PRNG's state. (RC4-drop4096)
• A KeyExpiredError will be raised after 255 iterations of the PRNG, excluding the initial drop.

It does not yet implement a more complex keystream generator or a larger state space. Additionally, this has not been cryptanalyzed and should not be considered secure or used in production. This is strictly experimental, and subject to change without notice.

Tested on Python 3.2.3 with PyCrypto 2.4.1 and python-bitstring 3.0.2.

This modified version of the Heikki Toivonen's certdata2pem script automatically downloads the freshest certdata.txt file and converts it to PEM format. Requires M2Crypto.

Certmgr is in the Windows 7 SDK

A class Ive had in my snippets for awhile that can generate prime, perfect and fibonacci sequences as well as check whether or not a supplied value is any of them.

Lightweight drop-in encryption wrapper for various Client/Server solutions supporting protocols such as UDP, TCP, HTTP, HTTPS, FTP, RAW Sockets etc.

Encryption can sometimes be a nightmare, at least is my experience while Python has some excellent resources for encryption I found myself a lot of times needing an encryption solution that could port easily between VS C++, .NET, PHP, and Python projects that would be simple to implement and not rely on large bloated crypto libs.