It is not possible to crack a card with just your Android phone, as it does not permit low level access to the NFC hardware. Mifare Classic. – (sufficient for reading / cracking / writing / cloning Mifare Classic Cards) • Chinese UID Changeable Mifare – U$ 2 – With those cards an attacker is able to create a perfect clone of any Mifare Classic card (including UID) • Those Items can be easily bought in ebay.com or aliexpress.com from Thaiwan/China. Overview • Why? • MIFARE Classic? • MIFARE Ultralight? • Reading and capturing contents of the card • About this manufacturer block (Sector 0 – Block 0) • The UID thing that messes with my head • Writing a 4Byte dump on a different card Why? The MIFARE NFC card is used in many environments. I got a trash card, a card that I have to use to open the underground trash bin, that I want to clone. As the replacement costs for a lost / broken card is €10 a clone would be a good investment. By holding the card in front of the reader, I can open the trashcan, ohw happy days. In my search for information, I found the following pages interesting: • • • • • • • • (Ultralight / 7Byte UID) • • • • MIFARE Classic? Some informational dumps: • 16 bits CRC per block • Anticollision loop • 1kB or 4kB of EEPROM • CRYPTO1 strem cipher (, ) • Manufacturer / data / value blocks MIFARE Ultralight? MiFare Ultralight cards typically contain 512 bits (64 bytes) of memory, including 4 bytes (32-bits) of OTP (One Time Programmable) memory where the individual bits can be written but not erased. MiFare Ultralight cards have a 7-byte UID that uniquely identifies the card. Reading and capturing contents of the card After some investigation I noticed that my Samsung mobile phone has a NFC reader. I used the on my Samsung S6, the the result was a bit disappointing. Detailed information about every sector on the card (if any data would be present except the UID) So the only interesting information is in Sector: 0, also called the manufacturer block. Bseap hall tickets 2014 download. AP SSC 10th Class Hall Ticket Download 2014 or Andhra Pradesh 10th Class Hall ticket download at bseap.org SSC hall tickets available at AP 10th class official website bseap.org. Searching for AP SSC Hall tickets for the board exams going to be held on 2018?? Then, this is the right place for you to get the complete updates on BSEAP Hall Tickets 2018. AP 10th SSC Hall Ticket 2014 – Download 10th Admit Card for Regular and Private Andhra Pradesh Secondary Exam Hall Ticket Download 2014 Board of Secondary Education Andhra Pradesh (BSEAP) is going to announce the examination for secondary class. SSC March-2014 Hall Tickets, 10th Class Exams Hall Tickets can download from www.bseap.org. Secondary School Certificate (SSC) Hall Tickets for Regular, Once Failed, OSSC, Vocational can download from online, SSC Timetable. I also noticed that the UID was 7Byte, making it a MIFARE Ultralight card grrrrrrr About this manufacturer block (Sector 0 – Block 0) This part of the card is the only interesting part, as no other data is written to any sector/block as far as I can see. In order to understand the difference between a 4Byte and 7Byte UID (i.e. MIFARE Classic vs MIFARE Utralight), I have added some pictures: A more detailed picture explains some more information is included after the serial number on block 0: A more detailed picture of the 7byte UID: The UID thing that messes with my head As you could see on my tag info, the UID on my trash card is 7 byte, so it works a bit different than the 4 byte one. The are explained as follows. A 4 byte UID is an identifier which has been assigned by the card manufacturer using a controlled database. This database ensures that a single identifier is not used twice. In contradiction, a 4 byte ID is an identifier which may be assigned to more then one contactless chip over the production time of a product so that more then one card with the same identified may be deployed into one particular contactless system. Writing a 4Byte dump on a different card As it is just cool to write a cards dump back, I have found a 4Byte UID MIFARE Classic 1kB card.
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