I understand that the ability to unlock or lock a car is based on the frequency of the transmission from the key, but hypothetically wouldn’t some of these eventually overlap and lead to someone being able to unlock someone else’s car?
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Car keys use rolling codes to unlock the car. It’s similar to a lot of garage door openers too. The car has a set of future codes so if it misses one or two it can “authenticate” the next one. Each time you hit your unlock button the codes roll.
At least that’s my understanding.
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