This is a little blog about my trials of figuring out how to clone a 7-byte 1k MFC card and more I discovered. I'm not an expert, this is just what I found out. I'm writing it down because I couldn't find a single place where this info was grouped together.
A little while ago I bought a Flipper Zero because I was interested in the world of NFC/RFID tags and I wanted to figure out a way to clone my NFC card used to open the underground waste container in my neighbourhood.
- It turns out most of my NFC cards used for various services are so called MIFARE Classic (MFC) 1K cards. These appear to be the most common card used for semi-secure things. The tag used to enter my office is a MIFARE DESfire card, which as far as I know, isn't clonable unless you have the decryption keys.
- There is also a MIFARE Classic 4K version which can store more data. I haven't encountered this one yet so nothing I can tell you about it.
- The MFC Classic