Holy crap, this is scary stuff. Researchers have successfully cut keys from digital photos. And to think people accuse me of being paranoid for having a security system at home.
Using a digital image of a key from almost any angle, Sneakey measures the depth of each cut, strings together this information and spits out a bitting code – typically a five or six digit number – that locksmiths use to make each cut on a blank key. The bitting code, along with the basic key information is enough to make a duplicate key.
http://www.readwriteweb.com/archives/sneakey_robbers_turn_to_the_so.php
Then again, let’s try to remember that old saying: Locks only keep honest people out.