Cryptanalytic attack on an RFID chip

[Hadmut Danisch]

On Sat, Jan 29, 2005 at 01:09:32PM -0500, Steven M. Bellovin wrote:
> This chip is used in anti-theft 
> automobile immobilizers and in the ExxonMobil SpeedPass. 

If I recall correctly, there are two different electronic
functions in key cars. One is the theft protection where the chip 
needs to authenticate when starting the engine (in Europe e.g. Ford
introduced this some years ago, the keys had a red, and the car came 
with a fully red master key (yes, both a mechanical and
cryptographical key) which allowed to teach the car to accept
additional keys). The other function is the remote control to open the
doors by pressing a button at the key. 

Does this attack compromise the theft protection only or the door
opener as well?


regards
Hadmut

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