In this lesson, you will act as the receiver of the signed jar file
containing the count.class file.
It requests access to your system resources on your system that it normally
would not have permission to access. 
This procedure requires you to perform the following steps listed below.
keytool -import command, and give it the alias susan.
count application signed by
susan to read the specified file on your system.
count
application to verify that with a trusted certificate and access
to your new policy file that grants it permission to read files on your
system, count can now read your data file.