NTAG 424 DNA NFC Blank Card | AES-128 SUN Encryption | 85.5x54mm
NTAG 424 DNA NFC Blank Card | AES-128 SUN Encryption | 85.5x54mm
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Short Product Description
Short Product Description
The NTAG 424 DNA NFC blank card sets a new standard for secure IoT authentication and anti-counterfeiting. Featuring AES-128 cryptographic encryption and Secure Unique NFC (SUN) message generation, it dynamically authenticates each tap via standard smartphones without requiring a dedicated app. Compliant with ISO/IEC 14443-4 and NFC Forum Type 4 standards, this 85.5x54mm PVC card provides 416 bytes of memory. Available in-stock at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) for enterprise and developer applications.
Key Features
Key Features
- Secure Unique NFC (SUN): Generates a dynamic, AES-128 encrypted authentication message on every tap to prevent cloning.
- High-Security Cryptography: Features 5 customer-defined AES keys for mutual authentication and secure data access.
- Privacy Protection: Supports Random ID and encrypted UID/data mirroring to comply with strict user data protection regulations.
- Universal Compatibility: Compliant with ISO/IEC 14443-4, ISO/IEC 7816-4, and NFC Forum Type 4 Tag standards.
- App-Free Authentication: Works natively with Android and iOS 11+ devices for seamless URL-based verification.
- Standard CR80 Size: The 85.5mm x 54mm blank white PVC card is ready for custom thermal printing.
Full Product Description
Full Product Description
Advanced Cryptographic Security with AES-128
This smart card utilizes AES-128 encryption to generate a Secure Unique NFC (SUN) message upon every tap. Unlike standard static NFC tags that can be easily cloned, the NTAG 424 DNA chip dynamically generates a unique, encrypted authentication code (CMAC) appended to the NDEF URL. When tapped by an NFC-enabled mobile device, the backend server verifies this dynamic code in real-time, making it impossible for counterfeiters to copy or replay the tag's data.
Standardized NFC Forum Type 4 Compliance
The NTAG 424 DNA chip is fully compliant with ISO/IEC 14443-4 and ISO/IEC 7816-4 standards, ensuring maximum interoperability with existing NFC infrastructure. It features a file-based storage structure with a total capacity of 416 bytes, which is formatted according to NFC Forum Type 4 specifications. With a reading distance of up to 10cm, it provides a seamless and responsive user experience for access control and product identification.
Privacy Protection and Random ID Support
To protect user privacy and prevent unauthorized tracking, this chip supports Random ID and encrypted UID/data mirroring within the NDEF file. It features five customer-defined AES keys that enable advanced cryptographic functions, including mutual authentication between the secure host/reader and the card. This ensures that sensitive NDEF files and extra data files remain strictly protected against unauthorized access.
Technician Tip
When programming the SUN feature, ensure your backend server is properly configured to decrypt and authenticate the dynamic AES-128 CMAC appended to the URL. Because the authentication mechanism relies on standard NDEF URLs, end-users can verify the card's authenticity using native NFC reading capabilities on Android and iOS 11+ devices—no custom application is required. The standard CR80 size (85.5x54mm) PVC surface is fully compatible with thermal ID card printers, allowing you to print custom employee badges or brand designs easily.
Technical Specifications
Technical Specifications
- Chip Model: NTAG 424 DNA (NT4H2421Gx)
- Operating Frequency: 13.56MHz
- Memory Capacity: 416 Bytes (File-based storage structure)
- Cryptographic Algorithm: AES-128
- Security Features: SUN Message, CMAC, Random ID, Encrypted UID
- Compliance Standards: ISO/IEC 14443-4, ISO/IEC 7816-4, NFC Forum Type 4 Tag
- Read Distance: Up to 10cm (Depending on reader power and antenna)
- Card Dimensions: 85.5mm x 54mm (Standard CR80)
- Material: Blank White PVC
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
What is the difference between NTAG 424 DNA and standard NTAG 215/216?
Standard NTAG 215/216 chips store static data, meaning anyone can copy the URL or data and clone the tag. The NTAG 424 DNA features AES-128 cryptography and generates a dynamic, changing code (SUN message) every time it is tapped, making cloning practically impossible.
Do users need to download a special app to verify this card?
No. The SUN authentication message is appended to a standard NDEF web URL. When a user taps the card with an NFC-enabled Android or iOS 11+ smartphone, it automatically opens the web browser and sends the dynamic code to your secure server for verification.
Can I print my own company logo on these blank cards?
Yes, these cards are manufactured to the standard CR80 size (85.5mm x 54mm) with a smooth PVC finish. They are fully compatible with standard thermal ID card printers (such as Zebra, Fargo, or Magicard) for custom branding.
What is the usable memory capacity of the NTAG 424 DNA?
The chip features a file-based storage structure compliant with ISO/IEC 7816-4, providing a total of 416 bytes of memory. This is sufficient for storing secure NDEF URLs and additional protected data files.
Is this NTAG 424 DNA card available for immediate pickup in Hong Kong?
Yes, we stock these high-security NTAG 424 DNA blank cards at our Sham Shui Po physical store. You can order them online for delivery or visit us during business hours for immediate pickup.
Target Users / Applications
Target Users / Applications
- Anti-Counterfeiting Brands: Embedding secure authentication into luxury goods, limited-edition merchandise, or warranty cards.
- Secure Event Organizers: Issuing uncloneable VIP passes and event tickets that authenticate dynamically at the gate.
- Enterprise IT Administrators: Deploying high-security access control badges utilizing ISO/IEC 14443-4 mutual authentication.
- IoT System Developers: Creating secure physical touchpoints for asset management and maintenance logging systems.
