Endangering those debaucherous Xmas party photos, and hence blackmail, Blackberry makers RIM have filed a patent that allows users to have their mobile cameras without exposing businesses to corporate espionage.

Using a lock and key system the technique would allow happy snaps with the key in but disable camera mode once it has been removed.

Ingenious! Now if we can just get everyone to promise not to use a second key we’re in business.