Topic: Question nfc tags

Hello to all
I have some questions about nfc tags
it is possible to read the tag ultralight c after authentication? you can give a read protection to the tag?
how the 3des authentication in mifare ultralight c? what happens between the reader and the tag?
if the tag is protected read, I can read the serial numeber?

I do these questions because I want to create an application where only some readers may read the contents of the encrypted tag

P.S. sorry for my english

Re: Question nfc tags

Hello,

You can mandate authentication prior to a read command.
Nevertheless the UID will always be readable through the anti-collision protocol.

Read carefully the following posts, they should answer your other questions:
* http://www.libnfc.org/community/topic/7 … iguration/
* http://www.libnfc.org/community/topic/6 … -3des-key/

Phil