Chip vs Chip

MIFARE Classic 4K vs MIFARE DESFire EV2

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MIFARE Classic 4K offers 4096 bytes memory with Crypto-1 (broken) security, making it ideal for legacy transit with stored value, multi-application cards. MIFARE DESFire EV2 provides 2-32 KB with AES-128 + proximity check security, suited for high-security transit, national ID, government.

    
  


  
  
  

    
      
MIFARE Classic 4K

      

        
FamilyMIFARE

        
Memory4096 bytes (user: 3440 B)

        
Price$0.120 – $0.250

      

    
    
      
MIFARE DESFire EV2

      

        
FamilyMIFARE

        
Memory2048 bytes (user: 1760 B)

        
Price$0.600 – $1.400

      

    
  

  

  
  

  






  
  

    
MIFARE Classic 4K vs MIFARE DESFire EV2


DESFire EV2 extends EV1's already comprehensive security advantage over Classic 4K with
proximity-check relay attack protection and the MIsmartApp multi-tenancy framework.




Overview


MIFARE Classic 4K: 4,096 bytes, Crypto-1 (broken), ISO 14443-3A, 40 sectors.


MIFARE DESFire EV2: AES-128 + Proximity Check, 2–32 KB, ISO 14443-4, MIsmartApp
framework for delegated application management. EV2 was the mandated platform for
several national transit network upgrades in the 2015–2020 period.




Key Differences


    

  • Relay attack protection: EV2 adds Proximity Check — a timing-based protocol that
  verifies the card is physically near the reader. Classic 4K has no such protection.
    • 

  • Memory ceiling: EV2 in 32 KB configuration provides ~9× more memory than Classic 4K.
    • 

  • Application management: MIsmartApp allows a card issuer to delegate key management
  for specific AIDs to third-party service providers without exposing the master key.
    • 

  • Security posture: Classic 4K is cryptographically broken. EV2 has no known
  practical attack.
    • 





Technical Comparison






Parameter
MIFARE Classic 4K
MIFARE DESFire EV2






Memory
4,096 bytes
2–32 KB




Security
Crypto-1 (broken)
AES-128 + Proximity Check




Relay attack protection
None
Yes




Delegated app management
No
Yes (MIsmartApp)




Protocol
ISO 14443-3A
ISO 14443-4 (T=CL)




NDEF support
No
Yes




Typical cost (volume)
$0.15–$0.35
$0.50–$1.00








Use Cases


EV2 replaces Classic 4K in multi-application, high-security environments where relay
attack scenarios are a concern: premium transit networks, national ID programs, and
high-value corporate access systems.




Verdict


EV2 is the correct modern replacement for Classic 4K in any multi-application program.
The relay attack protection and delegated application management capabilities make it
the right choice for post-2020 card issuance.

  

  

  
  
  

    
Recommendation

    
Choose MIFARE Classic 4K when you need largest Classic with 4 KB memory; choose MIFARE DESFire EV2 when you need relay attack protection via proximity check.