2. I am trying to read and write data on a Mifare Classic 1k NFC tag. I found the keys and the access conditions of the card thanks to this app : .PCSC Mifare Program is a program that allows you to read and write Mifare cards using the ACR122U NFC Reader. It can be used to modify the UID of gen3 magic cards. The card types include the following: S70 4K 7B, S70 4K 4B, S50 1K 7B, S50 1K 4B, Mifare Mini, Ultralight EV1, Mifare DESFire EV1, . See more