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Which chip for an economical 14443 tag with strong clone protection ?

Question asked by Frédéric Claverie on Jul 9, 2019
Latest reply on Jul 15, 2019 by Javier Camino



We are considering using RFID technology for a medical device. Our objective is to ask our users to scan a unique tag each time they use a single use consumable kit for traceability reasons. We want the tag to act as a single-use token or ticket (scanning it will deplete the credit stored on it). We are looking only into ISO 14443 tags (short range of reading)


We need to be able to write a small amount of data on the TAG (less than 1k) with an intermediate security level and a very good clone protection. We would like the chip to be available easily in wet-inlay form (not plastic cards).  


We have been looking into various chips but it is hard to decide wich one is best suited. We are hesitating between : MIFARE Ultralight C, MIFARE plus ES and NFC NTAG 424 DNA  (DESFIRE seems oversized security wise). 


Given the fact that we are basically looking for a rather simple and economical tag but with strong cloning protection, what would be in your opinion the best chip ? 


PS : we also noticed that the DES protocol used in Ultralight C is obsolescent and is not recommended for new projects. Not clear what is the impact on Ultralight C chips.  


Thanks for you help and advices,