Spam ? - 134 kHz RFIDs

John Teller jsteller at
Sat Feb 12 23:34:25 CST 2005

I guess 40 bits isn't nearly as strong as it used to be...  Hopkins used 16 FPGAs in parallel to quickly crack the Exxon-Mobil and car imobilizing RFIDs produced by Texas Instruments.  Kind of like an update to the Enigma-cracking "Bombes" of Alan Turing and WWII fame.

It appears TI relied largely on the fact that the challenge-response and encryption used in these tags is unpublished and held closely by TI.  Alas, there is no security in obscurity.

--- JST

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