Hide those keys. A quick camera phone picture could unlock your doors.
Scientists in California have developed a software algorithm that automatically creates a physical key based solely on a picture of one, regardless of angle or distance. The project, called Sneakey, was meant to warn people about the dangers of haphazardly placing keys in the open or posting images of them online.
Whole article:
http://dsc.discovery.com/news/2008/11/19/keys-theft-copy.html