MCrypt

Name     A routine to crypt files 
Version  02/2001
Author   André Doff 
         (see EMail Addresses)
Distrib. Freeware 
Type     REXX DLL & EXE 
Price    -
Source   Internet 
         Name: mcrypt.* 

"MCrypt encrypts a specified file with a password and code, without 
deleting the source file."