# MIFARE DESFire Keyfob — AES-128 Secure NFC Fob

URL: https://proudtek.com/products/rfid-keyfobs/mifare-desfire-keyfob/
Source URL: https://proudtek.com/products/rfid-keyfobs/mifare-desfire-keyfob/
Generated: 2026-03-16T01:42:30.697Z
Kind: product
Publisher: Proud Tek Co., Limited
Author: Proud Tek Co., Limited
Credentials: ISO 9001:2015, ISO 14001:2015, RoHS Compliant, CE Marking, REACH Compliant
Image: https://proudtek.com/landing-images/mifare-desfire-keyfob.jpg
Image Alt: MIFARE DESFire keyfob with AES-128 security for access control and transit

## Description
MIFARE DESFire keyfobs deliver the same AES-128 authentication, Common Criteria EAL5+ silicon, ISO/IEC 14443-3/4 air-interface, ISO/IEC 7816-4 APDU...

## Procurement Snapshot
- Best fit: Best for access control, parking, elevator, and membership credential projects.
- Key options: Form Factor: Compact keyfob form factor for handheld access credentials.
- Customization: Confirm artwork, encoding, material, chip, and finish requirements before quoting.
- Quote checklist: Reference MIFARE DESFire Keyfob — AES-128 Secure NFC Fob in your inquiry so the matching product page stays attached to the quote. Compact keyfob form factor for handheld access credentials. Share target chip or protocol, quantity,...

## Key Specs
- Form Factor: Compact keyfob form factor for handheld access credentials.

## FAQ
- Q: Is a DESFire keyfob interchangeable with a DESFire card on the same system?
  A: Yes. The access control system communicates with the DESFire chip, not the physical form factor. A DESFire keyfob with the same application structure and keys as a DESFire card is treated identically by the reader. Users can choose their preferred form factor (card or keyfob) without any backend configuration difference.
- Q: What is the read range of a DESFire keyfob versus a card?
  A: Keyfobs typically have a slightly smaller antenna than cards (due to the compact housing), resulting in a read range of 2-4 cm versus 3-5 cm for a full-size card on the same reader. This difference is negligible for tap access. Users hold the keyfob against the reader and the transaction completes in under 100 ms.
- Q: What is the MOQ and lead time?
  A: DESFire keyfobs in ABS housing: MOQ 200, lead time 12-15 business days. With custom color, logo printing and pre-personalized application structures: MOQ 300, lead time 15-18 business days. Silicone waterproof housing: MOQ 200, lead time 15-18 business days. Encoding and UID lists included with every order.
- Q: Why DESFire EV3 and not MIFARE Plus EV2 for a new deployment?
  A: Both are AES-128 and both are correct choices. DESFire EV3 is recommended when the deployment needs independent applications (access + transit + cashless + loyalty on one credential), Secure Unique NFC (SUN) for tap-to-URL authentication, or the hardened Transaction MAC with per-command CMAC. MIFARE Plus EV2 in security level 3 is recommended when the deployment is pure access control that must remain byte-compatible with Classic-mapped reader firmware for a transitional period; Plus EV2 supports the same Classic 1K/4K sector memory model so existing readers continue to work. The full side-by-side is on [Plus EV2 vs DESFire EV3](/compare/mifare-plus-ev2-vs-desfire-ev3/).
- Q: Can my phone read a DESFire keyfob?
  A: The phone can read the chip UID without authentication (any iPhone 7+ or NFC-enabled Android with an NFC diagnostics app like NXP TagInfo can retrieve the 7-byte UID), but it cannot authenticate into an application without the AES key. For consumer tap-to-URL using DESFire EV3's Secure Unique NFC (SUN) feature, the application URL embeds a per-tap rolling MAC that the back-end validates server-side; the phone tap works like any NDEF URL tap and no app is required. For access control authentication the phone is not involved; only the physical reader holds the application keys.

## Machine Routes
- JSON: https://proudtek.com/machine/products/rfid-keyfobs/mifare-desfire-keyfob.json
- Text: https://proudtek.com/machine/products/rfid-keyfobs/mifare-desfire-keyfob.txt