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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Physical hard keys can. 7 pins times 5-7 positions is only 16800 or so possible combinations. Popular car models may have several vehicles with the same combinations.
Electronic key fobs use a different combination each time the button is pressed to it is unlikely for the combinations to be repeated. You also need to pair the key fobs to the engine computer so they will communicate.
Physical hard keys can. 7 pins times 5-7 positions is only 16800 or so possible combinations. Popular car models may have several vehicles with the same combinations.
Electronic key fobs use a different combination each time the button is pressed to it is unlikely for the combinations to be repeated. You also need to pair the key fobs to the engine computer so they will communicate.
The key fob doesn’t just send out a single frequency that matches its car, in fact all fobs and cars probably use the same basic frequencies. They use those frequencies to send specific digitally coded sequences that only one matching car will recognize. There are far more possible codes than there are cars so there’s no danger of unlocking the wrong car.
The key fob doesn’t just send out a single frequency that matches its car, in fact all fobs and cars probably use the same basic frequencies. They use those frequencies to send specific digitally coded sequences that only one matching car will recognize. There are far more possible codes than there are cars so there’s no danger of unlocking the wrong car.
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