ISO/IEC 14443 contactless standard

[Papa Carder]

Overview of ISO/IEC 14443​

ISO/IEC 14443 is an international standard for contactless proximity cards, defining the characteristics and protocols for short-range wireless communication between identification cards (or similar devices) and readers. It operates in the high-frequency (HF) RFID band and is widely used in applications requiring secure, efficient data exchange over distances typically up to 10 cm.

History​

The standard's development started in the early 1990s to address the demand for secure short-range wireless technologies in identification and payment systems. It is considered a contactless short-range standard with higher RF speeds compared to other RFID standards like ISO/IEC 15693. The standard is maintained by ISO/IEC JTC 1/SC 17/WG 8.

Parts of the Standard​

ISO/IEC 14443 is divided into four main parts, each addressing specific aspects of the technology:

• Part 1: Physical Characteristics (ISO/IEC 14443-1:2018) – Defines the physical properties of the cards, ensuring compliance with standards like ISO/IEC 7810 (ID-1 card size) or ISO/IEC 15457-1, or allowing for other dimensions.
• Part 2: Radio Frequency Power and Signal Interface (ISO/IEC 14443-2:2020) – Specifies the RF power supply and signal interface, including modulation and coding schemes for two variants: Type A and Type B.
• Part 3: Initialization and Anticollision (ISO/IEC 14443-3:2018) – Covers protocols for initializing communication and handling anticollision (managing multiple cards in the reader's field simultaneously).
• Part 4: Transmission Protocol (ISO/IEC 14443-4:2018) – Details the high-level data transmission protocol, including mechanisms like data block chaining, waiting time extensions, and multi-activation.

Technical Specifications​

• Operating Frequency: 13.56 MHz (HF RFID band).
• Data Rates: Standard rate is 106 kbit/s in each direction, using half-duplex communication (though higher rates like 212, 424, or 848 kbit/s are possible in extensions).
• Components: The system includes a Proximity Coupling Device (PCD, or reader) and a Proximity Integrated Circuit Card (PICC, or card). The PCD powers the PICC via electromagnetic induction.

The standard defines two incompatible signaling types — Type A and Type B — which differ in modulation and coding but share the same transmission protocol (Part 4). Both use load modulation with an 847.5 kHz subcarrier for card-to-reader communication.

Reader-to-Card Communication Comparison

Feature	Type A	Type B
Modulation	100% Amplitude-Shift Keying (ASK)	10% ASK
Bit Coding	Modified Miller	NRZ-L
Data Rate	106 kbps	106 kbps

Card-to-Reader Communication Comparison

Feature	Type A	Type B
Modulation	On-Off Keying (OOK) via Load Modulation	Binary Phase-Shift Keying (BPSK) via Load Modulation
Bit Coding (Data)	Manchester	NRZ
Subcarrier Frequency	847 kHz	847 kHz
Data Rate	106 kbps	106 kbps

Anticollision Protocols​

Handled in Part 3, these protocols manage multiple PICCs in the PCD's field. Type A uses a slotted ALOHA-based approach with binary tree resolution, while Type B employs a time-slot method. This ensures only one card communicates at a time, preventing data collisions.

Applications​

ISO/IEC 14443 is foundational for numerous contactless technologies and systems, including:

• Public transportation cards (e.g., Ventra, Calypso, CIPURSE).
• Contactless payment systems (e.g., EMV-based like Mastercard PayPass, Visa payWave, American Express ExpressPay).
• MIFARE cards (which implement parts or all of the standard).
• Biometric passports and national ID cards (e.g., in the European Economic Area).
• Contactless FIDO authenticators.
• Other uses like Nabaztag devices (using Type B).

Related Standards and Comparisons​

• Near Field Communication (NFC): NFC is partially based on and compatible with ISO/IEC 14443, particularly for card emulation mode. NFC devices can operate as ISO/IEC 14443 readers or cards.
• Comparisons: It differs from ISO/IEC 15693 (vicinity cards with longer range but lower speed) and relates to ISO/IEC 7816 (contact smart cards), ISO/IEC 18000 (item management RFID), and Sony's FeliCa (a proprietary but compatible system). Type A is more common in Europe, while Type B is used in some Asian systems and U.S. passports.

For the full technical details, the official ISO/IEC documents are available for purchase from the ISO website, as they provide the normative specifications.