On Jan 13, 2010, at 1:45 PM, Barry Shein wrote:
>
> There seem to be a lot of misconceptions about RFID tags. I'm hardly
> an expert but I do know this much:
>
> RFID tags are generic, you don't put data into them unique to your
> application.
>
Part of the original (or at least early) context for this thread was recovery
of default passwords. If the password is F(ser#), it's only learnable if you
know both F() and ser#. The vendor knows F() -- who knows ser#? If it's in an
RFID tag, or is DBlookup(tag#,vendor_db), being able to read this
admittedly-arbitrary number may indeed be a threat.
--Steve Bellovin, http://www.cs.columbia.edu/~smb
