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Given the number of cars on the roads now, what are the chances of my remote key fob unlocking another car (and vice versa)?
Trevor Campbell
Berrima, Australia
None. Modern cars use an encrypted rolling number system. While I don’t know the length of the cryptographic keys actually used, even short keys by today’s standards, say 512 bits, give an astronomically large number of actual key possibilities.
Furthermore, each key press transmits a completely different code – this means that a hacker can’t use a recording device to capture the code when the owner presses the fob and then replay…
