Topic: question about mifare 1k

it is possible that data from a Mifare 1k are encrypted using your UID? I have two cards with the same balance but with completely different data. the balance is not reported in any of the card in hexadecimal, binary, in string

Re: question about mifare 1k

As mifare classic was not so secure, indeed, some electronic wallet has doubled the security by encrypting the data using UID of the card.

This prevent from cloning a card (except if you are using a chinese writable UID card) but does not protect from saving and "restoring" data (and then you're previous balance)

Re: question about mifare 1k

you know any program or algorithm that is able to decrypt the data with the UID?