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This is Scientific Americans 60 Second Science.

I'm Sarah Vytok.

Someone who knows how can pick a lock using just a paper clip.

But how about with a smartphone?

Researchers at the National University of Singapore wondered if smartphone audio of a key turning

inside a lock could be used to figure out the shape of that key.

And spoiler alert, under the right conditions, they could create a few very good candidate

keys, including the correct key.

Zandarayi Ramesh, a grad student who led the work on the project, which the researchers called

Spy Key, said that the work was inspired by some previous research, where the movement of smart

watches on people's wrists was used to figure out the code of combination

locks. Essentially what they did was they were looking at smart watches on your wrist in order

to infer the pin to the combination lock. So in some sense they're able to measure the angle,

right? So we were like, okay, wait, people are doing this for combination locks. Maybe like, there

are some, you know, similar insights that we can apply to other kinds of locks.

And the most prevalent kind of locks is these kind of physical locks and keys.

...