Letting only trusted users write to NFC tags

[olan75]

Hello
I would like to have a system with NFC tags where:
- each tag has a URL readable by anyone
- the URL can be updated by certain users only (agents of the company)

Is this at all possible, via some kind of key authentication scheme?
What tag types / equipment would I need for this to work?
Ideally I would write an application to do this with a 6131 but I am open to other suggestions.

Thanks

[geri-m]

jop, if you use mifare, there is this possible. Key A is a standard key an open to public and key b is "secret" and required to change the content of the tage. just consult the mifare documentation for that. I believe topas can do that as well, but I'm not sure about it.

cheers, geri-m