Use biometrics instead of a password.
The only way to unlock your system is if your friend puts his eye up to his smartphone's camera and you put your smartphone up to your computer's iris scanner.
Then they would only need a picture of his eye themselves. 20 ways to get that outside of extradition.
Good job Republicans! Wow, never thought I'd say that.. Well, after being in power for 17 of the last 20 years, it's about time you did something right.
Um... 90% of Repubs voted FOR extending it...! http://clerk.house.gov/evs/2011/roll026.xml
System checkpoint complete.