| \chapter{Cryptographic Services} | 
 | \label{crypto} | 
 | \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: | 
 |  | 
 | \localmoduletable | 
 |  | 
 | Hardcore cypherpunks will probably find the cryptographic modules | 
 | written by A.M. 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 | 
 | \url{http://www.amk.ca/python/code/crypto.html}  | 
 | for more information. | 
 | \index{PGP} | 
 | \index{Pretty Good Privacy} | 
 | \indexii{DES}{cipher} | 
 | \indexii{IDEA}{cipher} | 
 | \index{cryptography} | 
 | \index{Kuchling, Andrew} |