”I have to press a button on the key fob to open it so it can’t be stolen by relaying the signal.” Having to press a button on the fob for it to transmit a cod

”I have to press a button on the key fob to open it so it can’t be stolen by relaying the signal.” Having to press a button on the fob for it to transmit a code key via radio does not mean that the key cannot be captured with an SDR by someone close by. Only a monotonic code as a part of the key can prevent replay attacks, and only proper encryption can hinder the code from being totally cracked.