[aprssig] RFID

[Brian B. Riley]

But what about a second key? If I drive the car today and after I get home my wife runs out to the store and uses her key ... how do they handle that?

On May 16, 2010, at 6:51 AM, Bob Burns W9RXR wrote:

> At 01:57 AM 5/16/2010, James wrote:
>> The newer cars dont need a key at all. Lexus and others use RFID to enable the car, push button start ignition and enable the doors to unlock.
> 
> I thought about that while I was writing my reply, James. These cars with keyless, pushbutton start certainly have a "cool" factor, but there are some security concerns. I wonder if they use a more sophisticated RFID system or if the manufacturers warn the owners that their "key" could be scanned by someone up to no good.
> 
> I did a little Googling to see what I could find on the subject. Here's a quote from edmunds.com:
> 
> "And the engine won't respond to a signal from just any old key fob. Dave Buchko, BMW product communications manager, explains: "Each key contains a chip with an ID code that the car must recognize. In addition, there is a random code that each key receives when the engine is shut off. The vehicle will read and match both codes. If the car cannot match the ID code to the last random code sent to the key in question, it won't start.""
> 
> So, with the BMW system, the car "re-programs" the remote each time you shut off the car. Not entirely theft proof, but at least they recognize the problem.
> 
> Personally, I'm not too worried. There are no BMW's or Lexus's in my future. <grin>



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cheers ... 73 de brian  riley,  n1bq , underhill center, vermont
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