On 2015-04-22 16:04 Jim Birch wrote: > If the key signal can be recorded and played back this would be extremely > weak security. I would have expected the car to require a response > calculated from a paired cryptographic key, ie, challenge the key, not the > driver.
I think the issue there would be that "relay attack" devices form a passive system which derives its effectiveness only from the fact that physical separation of key & car is no longer relevant. So any protocol implemented within the car & key system (i.e. without intervention by the owner) will have the same problem. But it occurs to me that a simple switch on the key fob so the driver can turn it off when not expecting to use the car for a while would be highly effective. David L. _______________________________________________ Link mailing list [email protected] http://mailman.anu.edu.au/mailman/listinfo/link
