Authentication of RF tags

[APipm.1]

Hi!

I've read the documentation on the ST25TV RF tags here,

I'm trying to implement an authentication process which I can use to validate the RFID I'm reading is not a duplicate RF tag.
I'm not interesting if the RF tag is a counterfeit tag, meaning that it was manufactured by a counterfeit manufacturer, but am interested in knowing if this tag is indeed one of 'my RFID tags', and not a clone.

I assumed I could do this by getting a key from of the RF tags in my system somewhere in my deployment process, then issuing a challenge to the tag when I read it, and having the tag create a signature of the challenge. Only the tag holding the correct private key would be able to correctly sign the challenge and so I would know it is not a clone of my tag.

reading the documentation, I don't get the sense this is what the authentication of the ST25TV tags is meant for. 
Am I misunderstanding something?

Thanks in advance!

[Thomas Q. · Accepted solution]

Hello,

The TruST25 feature of the ST25TV tags does not allow to implement the dynamic authentication process that you require.

As you seem to need a dynamic signature feature, i suggest looking at the ST25TA-E product (ST25TA-E - NFC Forum Type 4 secure Tag IC for product authentication - STMicroelectronics) which offers this ability.

Best regards,
Thomas