Just in case, the previous mechanism wasn't that much safe:<p><a href="https://www.theguardian.com/technology/2013/jul/26/scientist-banned-revealing-codes-cars" rel="nofollow">https://www.theguardian.com/technology/2013/jul/26/scientist...</a><p>The paper has been published only in 2016, with a few amendments to "hide" (maybe) the parts that could have led to replication by thiefs:<p><a href="https://www.computerworld.com/article/2971826/cybercrime-hacking/hack-to-steal-cars-with-keyless-ignition-volkswagen-spent-2-years-hiding-flaw.html" rel="nofollow">https://www.computerworld.com/article/2971826/cybercrime-hac...</a><p><a href="https://www.usenix.org/conference/usenixsecurity15/technical-sessions/presentation/verdult" rel="nofollow">https://www.usenix.org/conference/usenixsecurity15/technical...</a><p>Please note how the Authors only tested a few VW models, but Porsche and a number of other luxury car manufacturers used the same chip/mechanism so that itis very likely to be hackable in a similar way.