\chapter{Cryptographic Services}

\index{cryptography}

The modules described in this chapter implement various algorithms of

a cryptographic nature. They are available at the discretion of the

installation. Here's an overview:

\begin{description}

\item[md5]

--- RSA's MD5 message digest algorithm.

\item[mpz]

--- Interface to the GNU MP library for arbitrary precision arithmetic.

\item[rotor]

--- Enigma-like encryption and decryption.

\end{description}

Hardcore cypherpunks will probably find the cryptographic modules

written by Andrew Kuchling of further interest; the package adds

built-in modules for DES and IDEA encryption, provides a Python module

for reading and decrypting PGP files, and then some. These modules

are not distributed with Python but available separately. See the URL

\file{http://www.magnet.com/~amk/python/pct.html} or send email to

\file{[email protected]} for more information.

\index{PGP}

\indexii{DES}{cipher}

\indexii{IDEA}{cipher}

\index{cryptography}