CharlieCard
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Algebraic Attacks on the Crypto-1 Stream Cipher in MiFare Classic and Oyster Cards
Abstract:
MiFare Crypto 1 is a lightweight stream cipher used in London’s Oyster card, Netherland’s OV-Chipcard, US Boston’s CharlieCard, and in numerous wireless access control and ticketing systems worldwide. Recently, researchers have been able to recover this algorithm by reverse engineering.
Charlie Card is built on the ISO14443 (MiFare) RFID standard. I have a R/W interface but have not yet had time time set it up and begin programming for it. Tweakt 13:01, 5 July 2008 (EDT)
Ok, I finally dug out the card reader I picked up off eBay a while back. It's got an MFCR500 MiFare r/w interface and a AT89S52 microcontroller. Pin header is serial I/O and power (5v/tx/rx/gnd). I have absolutely no documentation on it or what type of firmware may or may not be present. I hope to attach this to a USB/TTL adapter and try to get this to do something useful during HOPE. Tweakt 12:36, 17 July 2008 (EDT)
YouTube video of the NXP MiFare hack being demoed
From Bruce Schneier, in the August 2008 Edition of CRYPYO-GRAM:
"London's Oyster card has been cracked, and the final details will become public in October. NXP Semiconductors, the Philips spin-off that makes the system, lost a court battle to prevent the researchers from publishing. People might be able to use this information to ride for free, but the sky won't be falling. And the publication of this serious vulnerability actually makes us all safer in the long run."
