Mifare Classic

• Mifare Classic was the first version of the Mifare standard
• It stores the card number on one of its sectors, then encrypts the communication between the card and reader, theoretically making it impossible, or at least very difficult to copy a card
• Unfortunately, a security flaw was discovered in the Mifare Classic standard which meant that with the right knowledge and hardware, a card could still be copied or another card in the series created