Salve a tutti volevo sapere quale sarebbe il chip più usato e più sicuro per la salute , con cui potrei aprire porta e pagare con la carta ??
All are perfectly for fine health wise. Infections only happed due to improper installation or mishandling, so search for a good piercer.
Here this answers the most common questions
@yeka has given you pretty much all the info you need, but so we can help you further
Can you provide us with some more information about the door(s) you are referring to?
Do you have photos of the door readers/cards/fobs?
Have you tried scanning the card with an app like Taginfo or similar? or are you wanting to install your own system?
some further reading for you