time machine backup protection

[macbody]

Hi,

I am using time machine to back up my macbook drive on an external hard drive. I "secured" my macbook with a password and home folder encryption so that if it gets stolen I get to annoy some people. So now what happens if my external hard drive containing my time machine back up is stolen ?
Is the time machine back up secured ? If not, what do I have to do?

Thanks.

ps: no I am not paranoid ;-)

 

[macbody]

any idea anyone ? will try to see what happens when I connect the drive to a normal computer...