MIFARE DESFire EV2 vs ST25DV
MIFARE DESFire EV2 offers 2-32 KB memory with AES-128 + proximity check security, making it ideal for high-security transit, national ID, government. ST25DV provides 4-64 Kbit with 64-bit password + configurable areas security, suited for IoT sensors, smart labels, energy harvesting, BLE pairing.
MIFARE DESFire EV2
ST25DV
MIFARE DESFire EV2 vs ST25DV
DESFire EV2 is a standalone secure card chip; ST25DV is a dual-interface IoT tag with I2C host integration and energy harvesting. Different architectures, minimal overlap.
Overview
MIFARE DESFire EV2: ISO 14443ISO 14443Standard for contactless smart cards at 13.56 MHz (Types A and B)View full →-4 (NFC-A), AES-128, Proximity Check, MIsmartApp, 2–32 KB.
ST25DV: ISO 15693ISO 15693Standard for vicinity-range smart cards, 1+ meter read rangeView full → (NFC-V), I2C interface, energy harvesting, 512 B – 8 KB, configurable memory areas with independent 64-bit passwords.
Key Differences
- Dual interface: ST25DV bridges NFC and I2C. EV2 is RF-only.
- Protocol: Different RF standards (ISO 14443-4 vs ISO 15693).
- Security: EV2 provides AES-128 authenticationauthenticationIdentity verification of NFC tags/readers via passwords or cryptographyView full →/" class="text-cyan-600 dark:text-cyan-400 underline decoration-dotted decoration-cyan-300 dark:decoration-cyan-700 underline-offset-2 hover:decoration-solid transition-colors">mutual authenticationmutual authenticationTwo-way identity verification between reader and tagView full →. ST25DV provides 64-bit passwords per area — no mutual authentication.
- Energy harvesting: ST25DV can power external circuits from the RF field.
- Architecture: EV2 is a card credential chip; ST25DV is a PCB-mountable IoT component.
Technical Comparison
| Parameter | MIFARE DESFire EV2 | ST25DV |
|---|---|---|
| Standard | ISO 14443-4 (NFC-A) | ISO 15693 (NFC-V) |
| Host interface | None | I2C |
| Memory | 2–32 KB | 512 B – 8 KB |
| Read range | 0–10 cm | 0–100 cm |
| Energy harvesting | No | Yes |
| Security | AES-128, Proximity Check | 64-bit password |
| Proximity Check | Yes | No |
| Typical cost (volume) | $0.50–$1.00 | $0.50–$1.50 |
Verdict
DESFire EV2 for secure credential card programs. ST25DV for MCU-integrated NFC/I2C bridge applications and IoT sensor nodes. Not substitutes.
おすすめ
Choose MIFARE DESFire EV2 when you need relay attack protection via proximity check; choose ST25DV when you need dual-interface (NFC + I2C) with energy harvesting.