slackbuilds_ponce/system/mcrypt

MCrypt is a replacement for the old crypt package and crypt command with 
extensions. It allows developers to use a wide range of encryption functions 
including encrypting files or data streams without having to be cryptographers.

The companion to MCrypt is libmcrypt, which contains the actual encryption 
functions themselves and provides a standardized mechanism for accessing them.

The mcrypt package is recommended if you are using phpmyadmin for database 
administration.  To actually use mcrypt, you would have to recompile php with 
the following config switch:  "--with-mcrypt=shared,/usr/bin"