Half a croissant, on a plate, with a sign in front of it saying '50c'
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Rhythm PIN

  [vote for,

Your PIN must be entered in a certain rhythm, although it allows for leeway (maybe you could set your own rhythm and leeway). It doesn't matter whether it is fast or slow, just that it is close to your chosen rhythm.
modular, Oct 19 2003

"keystroke dynamics" http://www.google.c...ystroke+dynamics%22
fairly baked for computer authentication [krelnik, Oct 04 2004]


       Dum.... da-Dum Dum.... (the Dragnet PIN)
waugsqueke, Oct 19 2003

       it'd work. +
jonthegeologist, Oct 19 2003

       Sign on ATM: "Due to technical difficulties, please press PIN number at 120 BPM"
Cedar Park, Oct 19 2003

       Looks like my 'random generic PIN # idea' post produced some fruit...
RayfordSteele, Oct 19 2003

       Ah, but what about ATM Card thieves with sharp hearing (and perfect pitch).....
Peticelli, Oct 19 2003

       I want the ATM to be playing Ian Dury when you approach it.
waugsqueke, Oct 19 2003

       Ignition immobilisers in cars use a comparable method, sort of... If you lose you immobiliser key, you have to input a four digit number to the device. However, the only way to do this is to insert the key, turn it, wait for the light to flash X times, turn the key off, repeat for next number...   

       My step-sister learnt this when she lost her (immobiliser) key. It took her about a minute to start her car, because she kept going past the number she wanted, and had to start over.
Detly, Oct 19 2003

       Peticelli, the ATM need not play sounds, simply require rhythmic input.
swamilad, Oct 19 2003

       This is really pretty baked as a biometric authentication mechanism, but I don't know if anyone has applied it to an ATM yet. The folks in that field usually use the term "keystroke dynamics". See link.
krelnik, Oct 21 2003

       I have a friend who has a mild form of Cerebral Palsy. He's a great guitarist but has a very... uh... "dislocated" sense of rhythm (in everything, not just the guitar). He plays with the band no problem, but when playing on his own, his phrasing is all over the place. To input his PIN correctly he'd need the drummer with him.
kmlabs, Dec 07 2004

       [kmlabs] I think I see a boom in sales of electronic metronomes.
shapu, Dec 07 2004


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