Chip vs Chip

NTAG215 vs MIFARE DESFire EV2

NTAG215 offers 504 bytes memory with 32-bit password security, making it ideal for Nintendo amiibo, product tags, marketing posters. MIFARE DESFire EV2 provides 2-32 KB with AES-128 + proximity check security, suited for high-security transit, national ID, government.

NTAG 215

ファミリーNTAG
メモリ540 bytes (user: 504 B)
価格$0.080 – $0.200

MIFARE DESFire EV2

ファミリーMIFARE
メモリ2048 bytes (user: 1760 B)
価格$0.600 – $1.400

NTAG215 vs MIFARE DESFire EV2: Consumer Tag vs. Relay-Attack-Resistant Smartcard

NTAG215 and MIFARE DESFire EV2 represent opposite ends of the NFC design space: a simple consumer data tag versus a high-security smartcard with relay attack prevention.

Overview

NTAG215 delivers 492 bytes of NDEF data to any NFC smartphone without authentication. It is optimized for simplicity and smartphone compatibility.

MIFARE DESFire EV2 extends DESFire EV1 with proximity check — a timing-based mechanism that detects and blocks relay attacks where a legitimate card is used remotely without the cardholder's knowledge. It also adds MIsmartApp for delegated multi-application management. Available in 2/4/8 KB with AES-128 and comprehensive key management.

Key Differences

  • Relay attack prevention: DESFire EV2 adds proximity check; NTAG215 has no relay attack awareness. For high-value access control, this is a critical differentiator.
  • Security: NTAG215 — 32-bit password. DESFire EV2 — AES-128 mutual auth + proximity check.
  • Memory: NTAG215 — 492 bytes. DESFire EV2 — 2/4/8 KB.
  • Application management: DESFire EV2 MIsmartApp enables third-party application deployment on issued cards without compromising issuer security.
  • Smartphone readability: NTAG215 — native. DESFire EV2 — dedicated infrastructure.
  • Price: DESFire EV2 is 8–15× more expensive than NTAG215.

Use Cases

Choose NTAG215 when: - Consumer, smartphone-native NDEF is the use case - Relay attacks are not a threat model (open, informational data) - Amiibo compatibility is required

Choose DESFire EV2 when: - Physical access control where relay attacks must be prevented - Delegated third-party application management is architecturally required - Maximum security with proximity assurance is mandated

Verdict

NTAG215 for consumer NFC simplicity. DESFire EV2 for high-security access control where relay attack prevention is a hard requirement. The two chips do not compete in the same security tier.

おすすめ

Choose NTAG215 when you need mid-range Type 2 tag used in amiibo; choose MIFARE DESFire EV2 when you need relay attack protection via proximity check.