By RFID MFG Editorial Team · Updated June 15, 2026
Why the chip matters
At 13.56 MHz the antenna and card body can be identical — the chip decides memory, speed, security and price. Picking the right chip prevents costly re-issues later, especially for access control and payment where security is non-negotiable.
Common HF/NFC chips compared
| Chip | Memory | Security | Best for |
|---|---|---|---|
| NTAG213/215/216 | 144–888 bytes | Basic, password | NFC tap, marketing, auth |
| MIFARE Classic 1K/4K | 1–4 KB | CRYPTO1 (legacy) | Access, loyalty, closed transit |
| MIFARE Ultralight | 48–192 bytes | Basic | Disposable tickets |
| MIFARE DESFire EV2/EV3 | 2–8 KB | AES, strong | Payment, transit, secure ID |
| ICODE SLIX | ~1 KB | Basic | Library, long-range HF |
NTAG (NFC)
NTAG chips are tuned for NFC phone interaction. They store a URL or vCard, can be locked, and are inexpensive — ideal for tap-to-engage marketing, product authentication and digital business cards.
MIFARE Classic
A long-standing workhorse for access control and closed-loop loyalty/transit. Its CRYPTO1 cipher is now considered legacy, so for new high-security projects DESFire is preferred.
MIFARE DESFire
DESFire EV2/EV3 adds AES encryption and a flexible file system, making it the modern choice for payment, public transit and government ID where security and multi-application support matter.
Related reading
Frequently asked questions
Which RFID chip is most secure?
Among common HF chips, MIFARE DESFire EV2/EV3 is the most secure, using AES encryption and mutual authentication — suited to payment, transit and ID.
Which chip should I use for NFC marketing?
NTAG213/215/216 are the standard for NFC marketing and authentication: phone-readable, lockable and low cost. NTAG215 is popular for its 504-byte capacity.
Can you encode chips with our keys?
Yes — RFID MFG encodes MIFARE, DESFire and NTAG chips with your sectors, keys and data under NDA before delivery.