Proxmark3 vs Ultralight C

There have been no secrets this week while I’ve been trying to add Mifare Ultralight C support to the Proxmark. Ultralight C cards are HF (13.56MHz) tags that are part of the Mifare family.  This week has been an interesting learning process, and it has corrected some misconceptions I had about the card.  For those interested you can follow my progress at http://www.proxmark.org/forum/viewtopic.php?id=1946.  But I will summarise my findings below: Ultralight C…

RFID Wallets/Sleeves. How much Security do they provide?

With the increasing amount of RFID technology creeping into everyday life.  Just how much data can be obtained from your wallet?  At Pentura we undertook a small experiment where using standard off-the-shelf products, we would attempt to obtain personal information leaked from RFID enabled devices: UK Passport UK Bank Cards Debit/Credit Access Control Tokens Our experiment used standard unmodified off-the-shelf RFID equipment: 13.56MHz ACR-122U Reader Proxmark3 with LF antenna Proxmark3…

Proxmark3 – Adding Ultralight Support

Introduction The Proxmark3 appeared to be missing Mifare Ultralight support.  The ability to identify Ultralight cards was present within the ‘hf 14a reader‘ command. However the facility to read and write cards was sadly missing. But no worries as the protocol and instruction set is essentially the same as Mifare Classic; the only difference is standard Ultralight cards do not need authentication, and encryption and the Block size is 4…