\chapter{CRYPTOGRAPHIC EXTENSIONS}

The modules described in this chapter implement various algorithms of
a cryptographic nature.  They are available at the discretion of the
installation. 
\index{cryptography}

%Hardcore cypherpunks will probably find the Python Cryptography Kit of
%further interest; the package adds built-in modules for DES and IDEA
%encryption, and provides a Python module for reading and decrypting PGP files.
%\index{PGP}\indexii{DES}{cipher}\indexii{IDEA}{cipher}
%\index{Python Cryptography Kit}