This implies generating every possible code combination for a protocol like KeeLoq (which has billions of combinations).
Today, most access control systems use (also called hopping codes). Each time the button is pressed, a new pseudorandom code is generated using an algorithm like KeeLoq or AES-128. The receiver only accepts the next code in the sequence. Attempting a brute force attack on a rolling code system is futile because: flipper zero brute force full