Passive Types
Passive NFC¶
- No Battery uses the RF singal as quick voltage source
- Uses the scanner to modify and reflect the data.
https://www.righto.com/2024/06/montreal-mifare-ultralight-nfc.html?m=1 braid overview of passive rfids
Use the carrier frequency and some modulation to send information back to the reader. send data back, the tag switches its load on and off at 848 kHz (1/16 of the carrier frequency), producing a subcarrier on top of the reader's signal.
HID Seos (13.56 MHz)¶
- Contains a Smart Card
- Digital Signature Authentication
- Encrypted
- Can be added to a Smart Phone
DST (134 kHz)¶
ISO/IEC 14443¶
- Used in Biometric passports, Ventra, EMV. NFC
ISO/IEC 15693¶
- Uses either ASK or FSK
- Using Manchester Coding
https://en.wikipedia.org/wiki/ISO/IEC_15693
Manufacturer code:
- 0x01: Motorola
- 0x02: ST Microelectronics
- 0x03: Hitachi
- 0x04: NXP Semiconductors
- 0x05: Infineon Technologies
- 0x06: Cylinc
- 0x07: Texas Instruments Tag-it
- 0x08: Fujitsu Limited
- 0x09: Matsushita Electric Industrial
- 0x0A: NEC
- 0x0B: Oki Electric
- 0x0C: Toshiba
- 0x0D: Mitsubishi Electric
- 0x0E: Samsung Electronics
- 0x0F: Hyundai Electronics
- 0x10: LG Semiconductors
- 0x12: WISeKey
- 0x16: EM Microelectronic-Marin
- 0x1F: Melexis
- 0x2B: Maxim Integrated
- 0x33: AMIC
- 0x39: Silicon Craft Technology
- 0x44: GenTag, Inc (USA)
- 0x45: Invengo Information Technology Co.Ltd