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NTAG 424 DNA Personalization

Question asked by Ulrik Andersen on Jul 3, 2020
Latest reply on Jul 15, 2020 by Kan_Li




We are considering the NTAG 424 DNA tags for a system we're building and really like the built in AES encryption (even though an asymmetric algorithm would have been even more useful). 


My question relates to the personalization and the private key of the AES encryption of the tags:

Is it considered good practise to use the same private key for all tags in the system? Or is it possible to use different keys for each tag or batches of tags?

Having a single private key for 1.000s of tags makes that single private key extremely valuable and is effectively the single most important thing in the system.


Thanks in advance,