RFID

LF (Low Frequency)

• RF: 125 KHz

EM4100

Alias: ID card

HF (High Frequency)

• RF: 13.56 MHz
• ISO 18000-3
• Reader: MFRC522 (SPI port), PN532 (UART port)

MiFare

MiFare Classic

• MiFare Classic 1K Reference
• MiFare Classic 4K Reference
• ISO/IEC 14443 Type A

Alias: IC card

MiFare Classic Offline Cracker

MiFare Classic Universal toolKit

Name	Description
PICC	Proximity Integrated Circuit Card (Contactless Card)
ACK	Acknowledge
NAK	Not AcKnowledge
RF	Radio Frequency

PICC status

IDLE
 ⬇    Wake Up A / Request A
READY
 ⬇    Select / Read Card Serial
ACTIVE
 ⬇    Halt A
HALT
 ⬇    Wake Up A
READY

Memory Organization

MiFare Classic 1K = 16 ✖ Sector

1 Sector = 3 ✖ Data Block + Sector Trailer = 4 ✖ (16 Bytes)

MiFare Classic 4K = 
  32 ✖ Sector ( 3 ✖ Block + Sector Trailer) + 
   8 ✖ Sector (15 ✖ Block + Sector Trailer)
    = 256 ✖ Block

Sector[0] Read Only
Sector[0].Block[0] = 4 ✖ UID + Manufacturer Data

Data Block = 16 Bytes

Sector Trailer = Key A (6 Bytes) + Access Bits (4 Bytes) + Key B (6 Bytes)

NFC

• RF: 13.56 MHz