Thanks! To clarify, I had no knowledge of the actual technology used, and don't mean to indicate that it is crypographically secure or impossible to exploit. On

Thanks! To clarify, I had no knowledge of the actual technology used, and don't mean to indicate that it is crypographically secure or impossible to exploit. Only that people in the online car communities haven't found simple easy practical ways to bypass these systems for, e.g. when they lose their own keys. Which also, I would say means thieves aren't doing it either. Even when people do engine swaps to a new vehicle, they usually end up moving over the entire ECU, RFID antenna, and RFID tags because that's the easiest way to get the engine to run. Nobody is going to steal a 90s VW Jetta with Immo-2 when there are much easier to steal much more valuable cars everywhere. Neither shadetree mechanics, or street thugs that steal cars for drug money are spending a lot of time reading deeply into academic cryptography literature- it's only practically broken if you can either buy a $50 or less device, or follow instructions on a forum post to disable it.