Why can't NFC read the access card?

NFC (Near Field Communication) is a near field communication technology (NFCIP- 1) promoted by Philips, Nokia and Sony. It is a short-distance non-contact communication mode, and the effective communication distance is usually less than 4 cm. So why can't NFC read the access card?

1.NFC cannot read access cards because some access cards are encrypted and cannot be read without permission.

2. Common access cards are ID card and IC card. The full name of ID card is identification card, which is an unwritten induction card with a fixed number, while IC card is divided into encrypted, semi-encrypted and unencrypted. NFC can only copy IC cards without encryption. This access card is very convenient for direct simulation.

3. The access cards in the community are basically encrypted IC cards, and it is impossible to read cards with the NFC function of the mobile phone. Mobile phone manufacturers have also improved the encrypted access card. Some models support the creation of blank cards on mobile phones. Users can go to the residential property and ask the property to write the encrypted card information into this blank card.

That's why NFC can't read the access card.