Is it possible to fool fingerprint readers?

Now why would you be asking a question like this?


Asked by: Mary Brooks, Canterbury

It depends on the technology used within the fingerprint reader, but it is quite possible to trick many of them. Some will be fooled by a mould of your finger made out of the same gelatin as gummy bears – the gelatin has a similar electrical conductivity as your finger.

Some will be deceived by a fingerprint on a simple piece of sticky tape. Some are even outfoxed by a simple photocopied image of a fingerprint. Most are not aware if the owner of the finger is alive or dead. Like all security systems, fingerprint readers are not perfect.

Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.