[H] powerline networking?

[FORC5]

Received my hw to mess with and they have a button on them for 128 
bit encryption, why do they need this if they are considered wired ?

have not had a chance to mess with it, currently bridge is running Ok.
thanks
fp
Date:  Monday, August 26th, 2013

       ***Caution, Tagline Below ***
                **Tallyho**
******************************************
     Prejudice is the reason of fools.
******************************************