passwords

Hi.

I am a window linux user.
Not pro by any means.
I Do not like very secure passwords.
I have watched twice my computer trying to be comprimised.
Once I took my router off and left smbd open to the internet. something
was trying to access it.  turned it off life is good. Someting else was
trying to log into ssh. I turned ssh off with the router and it moved
on.  


So why can we not make password authentication slower so that a computer
program can't crack a 6 letter password in a life time. 


I can only login as fast a I type. And that is preety slow.