2022-07-14 Don't use mifare classic cards for stored value
More than 11 years ago I wrote about the Magna Carta card systems for access / payment and the use of the mifare classic (in Dutch). I found a strong statement on the Magna Carta website back then that using mifare classic for stored value was a really bad idea, since the encryption on the card is broken. It's now 2022 and I read MIFARE Cracking about a company using a mifare classic for stored value which shows the steps from discovering what type of card that company uses to the option of manipulating the stored monetairy value on the card. Found via Travis Goodspeed on twitter - A practical article on cloning a Mifare Classic employee badge to tamper with the snack machine.