Key Advantages of NTAG424 DNA
1. Protection Against Cloning
With NTAG213, someone can read the stored URL and copy it to another NFC tag. NTAG424 DNA, however, supports cryptographic authentication, meaning that simply copying the data is not sufficient to create a functional counterfeit.
2. Dynamic URL (SUN/SDM)
This is one of the greatest advantages of NTAG424 DNA.
Each time the chip is scanned, it can generate different cryptographically protected data, including a read counter.
Example:
First scan: www.podjetje.si/verify?ctr=1&cmac=...
Second scan: www.podjetje.si/verify?ctr=2&cmac=...
The server can verify whether the data originates from an authentic chip. With proper read counter validation, it is also possible to limit the reuse of intercepted URLs.
3. Product Authenticity Verification
NTAG424 DNA is particularly suitable for:
Brand protection and anti-counterfeiting of genuine products.
Authenticity verification of luxury goods.
More secure loyalty and rewards programs.
Authentication of tickets and vouchers.
Protection of documents and certificates.
4. Greater Memory Endurance
According to NXP, NTAG424 DNA supports at least 200,000 write cycles and 50 years of data retention, compared to 100,000 write cycles and 10 years of data retention for NTAG213.
Technical Specifications for NTAG424 DNA Key Fobs
Manufacturer: NXP Semiconductors
Chip: NTAG424 DNA
Standards: ISO/IEC 14443-3A (NFC Type 2)
Memory size: 416 bytes of data
Security: 7-byte unique identifier (UID), AES-128 cryptography, authentication capabilities, and anti-counterfeiting protection
Operating frequency: 13.56 MHz
Reading distance: Up to 10 cm (typically up to 5 cm)
Dimensions: 40 × 32 mm
Thickness: 4.5 mm
Material: ABS
Technical documentation for NTAG424 DNA chips and software tools is available here:
https://www.nxp.com/products/rfid-nfc/nfc-hf/ntag-for-tags-and-labels/ntag-424-dna-424-dna-tagtamper-advanced-security-and-privacy-for-trusted-iot-applications