MIFARE Classic Tool (MCT)

An Android NFC app for reading, writing, analyzing, etc. MIFARE Classic RFID tags.


General Information

This tool provides several features to interact with (and only with) MIFARE Classic RFID-Tags. It is designed for users who have at least basic familiarity with the MIFARE Classic technology. You also need an understanding of the hexadecimal number system, because all data input and output is in hexadecimal.

Some important things are:

For further information about MIFARE Classic check Wikipedia, do some Google searches or read the MIFARE Classic (1k) 'Datasheet' (PDF) from NXP.

Getting Started

First of all, you need the keys for the tag you want to read. Due to some weaknesses in MIFARE Classic, you can retrieve all the keys (A and B) of a tag with tools like the Proxmark3 or normal RFID-Readers and some special software (mfcuk, mfoc).

The application comes with standard key files called std.keys and extended-std.keys, which contains the well known keys and some standard keys from a short Google search. You can try to read a tag with this key file using "Read Tag" from main menu.

Once you know some keys, you can put them into a simple text file (one key per line). You can do this on your PC and transfer the file to the MifareClassicTool/key-files/ directory (on external storage), or you can create a new key file via "Edit or Add Key File" from main menu. If you are finished setting up your key file, you can read a tag using "Read Tag" from main menu.

Advantages of the Key Files Concept:

This dictionary-attack based mapping process (keys <-> sectors) makes it easy for you to read as much as possible with the keys you know!


This application was originally developed by Gerhard Klostermeier in cooperation with SySS GmbH (www.syss.de) and Aalen University (www.htw-aalen.de) in 2012/2013. It is free software and licensed under the GNU General Public License v3.0 (GPLv3)

Icons used in this application:

MIFAREĀ® is a registered trademark of NXP Semiconductors.