| \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} |