Old RFID tags = hacker’s playground. Upgrading yours?
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#InfoSec #RFIDSecurity

@iceman I tried to reprogram old mifare ultralight tags (transport tickets) as NDEF tags and failed.

But I learned why I couldn't do that! So it was still an educational experience
https://idefix.net/~koos/newsitem.cgi/1688147217

Trying to recycle mifare ultralight cards as NDEF tags.. and failing

While working with the other NFC tags I had a crazy idea: what if I can 'recycle' used one-time public transport tickets as NDEF tags. The one-time public transport tickets are mifare ultralight tags just like the touchatag tag. ...