On Tue, 7 Jan 2003 07:13:31 -0800 (PST) Mike Rosing <[EMAIL PROTECTED]> wrote:
> The dealer said it's a rolling code system, and from > the white paper this includes a 40 bit challenge, an > encryption operation on the key (!) then a 24 bit > response from the key. Hi Mike, do you have an actual specification of the algorithm used by the rolling code system or is that just another ingenious "high-level" whitepaper leaving out all the nice details ? I tried to find details for rolling code systems used in car keys a couple of years ago and came up with basically zilch on the specific algorithms employed by the manufacturers for their challenge reponse systems. Have you tried opening the key and had a look at the chip - doubt this will help much but to identify since I suspect car manufacturers customize these with their home-brewn algorithm. This is just an unfounded speculation on my part however. Also, I'd be interested where you can get these "replacement keys" for USD 8, and whether it's for Ford only. Cheers, Ralf
