27 people finished all the stages and correctly answered the puzzle within the allowed time.
The top ten won Naked Security T-shirts; two lucky randomly-selected winners picked up NERF gun prizes.
For those of you who didn't finish, here's how to do it, James Bond style.
Recover a stolen file, decrypt it, use it to identify a famous person, find out where he was incarcerated, and geolocate the prison...
(Enjoy this video? Check out more on the SophosLabs YouTube channel.)
If you enjoy this sort of challenge, watch this space: we run puzzles regularly.Follow @duckblog