How to encrypt the access control of IC card

Ic card is divided into 16 sectors, and each sector is divided into four blocks to store data, one of which is a password block, which is divided into A password and B password. The encryption of this password is called encryption. When reading the encrypted card, verify the password first, and then read the data in the card. The data in the IC card is stored in the card. If you copy, you need to crack the password first, and then copy all the data. An ID card is just a card number. Just copy a card with the same card number.