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Numb3rs
Rolling Codes
In this clip, Charlie tries to identify a crimal via the car keys in her purse. Car keys use a mathematical algorithm to send a different n digit number each time the button is pressed, which the locking mechanism can identify as right or wrong.
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Video Transcript
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go
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what do you know about it
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you should wear sunglasses and drives a set
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which we can't find
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others her keys
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yeah we did a search for the car but it didn't turn up
0:11
keyless entry mode actually poses a fairly interesting mathematical problem
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well
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well much of the general populace has a remote nowadays don't they
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I mean I think I read somewhere 80% of new cars come with a remote
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thanks
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a lot
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every remote has to have a unique one-to-one relationship with a single car
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a wise you walk out into a parking lot push that button
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any number of cars might unlock
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there's a each car has its own frequency
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that's just it
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they're all on the same frequency
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every remote has a numerical code that links it to just one car
0:46
see people don't often think about this stuff but it's an entirely math based technology
0:51
you know who might be able to help you with this is Larry his Cosmic listening project at Kitt Peak involve stack frequency work
0:57
I gotta find This Woman's car so anything you or Larry can do I mean I
