What exactly is an RFID card?

2025-06-15Cykeo News RFID FAQ 2350

An RFID card is a credit card-sized device that uses embedded radio frequency identification (RFID) technology to wirelessly transmit data. Unlike traditional cards with magnetic stripes, RFID cards contain a microchip and antenna that communicate with readers via electromagnetic fields, enabling touchless authentication, payments, and secure access.

1. Core Components & How They Work

🧩 Inside Your RFID Card:

Microchip: Stores encrypted data (e.g., user ID, access permissions).
Antenna Coil: Harvests power from a reader’s radio waves (no battery needed).
Substrate: Layered plastic (PVC/ABS) protecting components from bending or damage.

🔄 Communication Flow:

Energy Transfer: Card enters reader’s electromagnetic field (typically 2–10cm range).
Data Activation: Reader’s radio waves power the microchip.
Secure Transmission: Encrypted data transmitted at 13.56 MHz (HF band).

💡 Key fact: Passive RFID cards never require charging – all energy comes from the reader.

2. Types of RFID Cards

Type	Frequency	Primary Use Case
Low Frequency (LF)	125 kHz	Animal tracking, basic access
High Frequency (HF)	13.56 MHz	Contactless payments, secure access
Ultra-High Frequency (UHF)	860–960 MHz	Warehouse inventory tools

Note: Most “RFID cards” refer to HF systems (ISO 14443/15693 standards) used in security and finance.

3. Security Technologies

🔒 Protecting Against Unauthorized Scans:

Encrypted Authentication: AES-128 encryption handshakes verify legitimate readers.
Data Segmentation: Separated memory blocks limit access (e.g., biometrics vs. ID number).
Shielding: Built-in metal layers block rogue readers (e.g., RFID-blocking wallets).
Dynamic Codes: One-time passwords generate per transaction to prevent replay attacks.

Cykeo’s corporate access cards use multi-layer encryption that self-locks after 3 failed scan attempts.

4. Applications Beyond Access Control

Industry	Implementation
Corporate Security	Keyless building access with time restrictions
Public Transit	Touchless fare payments (e.g., London Oyster)
Healthcare	Patient identification and medication tracking
Payment Systems	Contactless Visa/Mastercard transactions

5. Comparing RFID Cards to Alternatives

Type	RFID Card	Magnetic Stripe	NFC
Security	High (encryption)	Low (static data)	High (dynamic codes)
Durability	5–10 years	1–3 years	Varies by device
Speed	< 0.5 seconds	2–3 seconds	Instant
Contact Required?	No (proximity-based)	Yes (swipe/insert)	Touch required

6. Future Innovations

Biometric Integration: Fingerprint sensors embedded in cards.
Energy-Harvesting: Solar-powered active RFID cards (extended range).
Blockchain Linking: Immutable audit trails for high-security facilities.
Eco-Cards: Cykeo’s plant-based biodegradable RFID cards launching 2025.

PgUp: How RFID Scanners WorkPgDn: What is RFID and How Does RFID Work

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