Comment by virtue3
I think if you have enough replays you can deconstruct the rolling code. Not sure.
Also there are ways to desync/resync your key so you might be able to “add a key” with the flipper with certain firmwares.
Cloning the current key and using it can desync it from your car. Super annoying. Be careful
I don’t know exactly how the rolling key works but wouldn’t it be kind of like having a secret stored in the key that’s needed to generate the next code? If it’s designed properly, recording a few thousand codes shouldn’t tell you anything about the next code, just like you can’t deduce private keys by looking at a few thousand encrypted files. I have no clue if that’s really how it works, so I would be happy to be corrected if my mental model is wrong here.