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EXTERNAL
NXP, THE NXP LOGO AND NXP SECURE CONNECTIONS FOR A SMARTER WORLD ARE TRADEMARKS OF NXP B.V.
ALL OTHER PRODUCT OR SERVICE NAMES ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS. © 2020 NXP B.V.
3 1 S T J U LY 2 0 2 0
Sandra Fuchs
Principal Customer Application Engineer
TRANSACTION TIMER
A MIFARE® DESFire® EV3 & MIFARE Plus® EV2 KEY FEATURE
VIDEO
1EXTERNAL
RESTRICTING TRANSACTION TIME TO MITIGATE MAN-IN-THE-MIDDLE ATTACKS
V I A T RAN S AC T I O N T I M ER F E AT U R E
• Newly available feature on MIFARE DESFire EV3 and MIFARE Plus EV2 products
• Transaction Timer allows card issuer to configure a maximum time a transaction can take to avoid interference by Man-in-the-Middle attacker
• Enablement of transaction timer limits the possibility of keeping the card powered and not finishing (holding) the ongoing transaction by an
attacker
• The value of the Transaction Timer can be set for each application individually (1, 10, 100 seconds can be chosen)
• Once threshold of Transaction Timer is exceeded, the card will automatically reset itself, go into IDLE mode and abort the transaction
• As long as the Transaction Timer does not expire, regular command execution is not influenced by the feature at all
− Applicable for existing infrastructures without changing reader terminals
Enhanced security
without changing
existing
infrastructures
Helping to avoid
Man-in-the-Middle
attacks and
transaction holding
Individual
configuration of
maximum time a
transaction can
take
2EXTERNAL
RESTRICTING TRANSACTION TIME TO MITIGATE MAN-IN-THE-MIDDLE ATTACKS
V I A T RAN S AC T I O N T I M ER F E AT U R E
Valid Transaction Reader
Terminal
Commit Transaction
Successful Transaction
• Finalized in time
Incomplete Transaction
• Not finalized in time
• Transaction Timer expired
Valid Transaction Reader
Terminal
Commit
Transaction
3EXTERNAL
TECHNICAL DETAILS: HOW TO ENABLE TRANSACTION TIMER ON THE CARD
On MIFARE DESFire EV3
• Individual enablement for each application (independently)
• Different Transaction Timer values for different applications
• Enablement is done using the SetConfiguration command with option 0x55
• Once enabled, timer setting will be reflected in the response to the AuthenticateEV2First
command in the parameter PDCap2.2
• The timer starts counting for every application selection
On MIFARE Plus EV2
• Can be enabled once for each card
• Enablement is done by writing the PDCap2.2 value inside the FieldConfigurationBlock to the
chosen Transaction Timer setting
• Once enabled, timer starts counting when receiving the first command after ISO/IEC 14443-4
card activation
• The Transaction Timer is active in SL1, SL3 and SL1SL3MixMode (not supported in SL0)
4EXTERNAL
MORE INFORMATION ABOUT THE TRANSACTION TIMER FEATURE
Item Number Availability
Datasheet - MIFARE DESFire EV3 DS4489 NXP DocStore (confidential)
Datasheet - MIFARE Plus EV2 DS5223 NXP DocStore (confidential)
Application Note - MIFARE DESFire EV3 Quick-Start Guide AN5755 NXP website (public)
Application Note - MIFARE DESFire EV3 Features and Hints AN5881 NXP DocStore (confidential)
Application Note - Feature and Functionality Comparison between
MIFARE DESFire EV2 and MIFARE DESFire EV3
AN5756 NXP website (public)
Application Note - MIFARE Plus EV2 Features and Hints AN5760 NXP website (public)
Application Note - Comparison between MIFARE Plus EV2 and
previous types
AN5762 NXP website (public)
RFID Discover Software SW1866 NXP DocStore (confidential)
NXP Reader Library (Windows based) SW1717 NXP DocStore (confidential)
https://www.nxp.com/products/rfid-nfc/mifare-hf/mifare-desfire
https://www.nxp.com/products/rfid-nfc/mifare-hf/mifare-plus
https://www.docstore.nxp.com/
NXP, THE NXP LOGO AND NXP SECURE CONNECTIONS FOR A SMARTER WORLD ARE TRADEMARKS OF NXP B.V. ALL OTHER PRODUCT OR SERVICE NAMES ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS. © 2020 NXP B.V.

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Transaction Timer Feature

  • 1. EXTERNAL NXP, THE NXP LOGO AND NXP SECURE CONNECTIONS FOR A SMARTER WORLD ARE TRADEMARKS OF NXP B.V. ALL OTHER PRODUCT OR SERVICE NAMES ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS. © 2020 NXP B.V. 3 1 S T J U LY 2 0 2 0 Sandra Fuchs Principal Customer Application Engineer TRANSACTION TIMER A MIFARE® DESFire® EV3 & MIFARE Plus® EV2 KEY FEATURE VIDEO
  • 2. 1EXTERNAL RESTRICTING TRANSACTION TIME TO MITIGATE MAN-IN-THE-MIDDLE ATTACKS V I A T RAN S AC T I O N T I M ER F E AT U R E • Newly available feature on MIFARE DESFire EV3 and MIFARE Plus EV2 products • Transaction Timer allows card issuer to configure a maximum time a transaction can take to avoid interference by Man-in-the-Middle attacker • Enablement of transaction timer limits the possibility of keeping the card powered and not finishing (holding) the ongoing transaction by an attacker • The value of the Transaction Timer can be set for each application individually (1, 10, 100 seconds can be chosen) • Once threshold of Transaction Timer is exceeded, the card will automatically reset itself, go into IDLE mode and abort the transaction • As long as the Transaction Timer does not expire, regular command execution is not influenced by the feature at all − Applicable for existing infrastructures without changing reader terminals Enhanced security without changing existing infrastructures Helping to avoid Man-in-the-Middle attacks and transaction holding Individual configuration of maximum time a transaction can take
  • 3. 2EXTERNAL RESTRICTING TRANSACTION TIME TO MITIGATE MAN-IN-THE-MIDDLE ATTACKS V I A T RAN S AC T I O N T I M ER F E AT U R E Valid Transaction Reader Terminal Commit Transaction Successful Transaction • Finalized in time Incomplete Transaction • Not finalized in time • Transaction Timer expired Valid Transaction Reader Terminal Commit Transaction
  • 4. 3EXTERNAL TECHNICAL DETAILS: HOW TO ENABLE TRANSACTION TIMER ON THE CARD On MIFARE DESFire EV3 • Individual enablement for each application (independently) • Different Transaction Timer values for different applications • Enablement is done using the SetConfiguration command with option 0x55 • Once enabled, timer setting will be reflected in the response to the AuthenticateEV2First command in the parameter PDCap2.2 • The timer starts counting for every application selection On MIFARE Plus EV2 • Can be enabled once for each card • Enablement is done by writing the PDCap2.2 value inside the FieldConfigurationBlock to the chosen Transaction Timer setting • Once enabled, timer starts counting when receiving the first command after ISO/IEC 14443-4 card activation • The Transaction Timer is active in SL1, SL3 and SL1SL3MixMode (not supported in SL0)
  • 5. 4EXTERNAL MORE INFORMATION ABOUT THE TRANSACTION TIMER FEATURE Item Number Availability Datasheet - MIFARE DESFire EV3 DS4489 NXP DocStore (confidential) Datasheet - MIFARE Plus EV2 DS5223 NXP DocStore (confidential) Application Note - MIFARE DESFire EV3 Quick-Start Guide AN5755 NXP website (public) Application Note - MIFARE DESFire EV3 Features and Hints AN5881 NXP DocStore (confidential) Application Note - Feature and Functionality Comparison between MIFARE DESFire EV2 and MIFARE DESFire EV3 AN5756 NXP website (public) Application Note - MIFARE Plus EV2 Features and Hints AN5760 NXP website (public) Application Note - Comparison between MIFARE Plus EV2 and previous types AN5762 NXP website (public) RFID Discover Software SW1866 NXP DocStore (confidential) NXP Reader Library (Windows based) SW1717 NXP DocStore (confidential) https://www.nxp.com/products/rfid-nfc/mifare-hf/mifare-desfire https://www.nxp.com/products/rfid-nfc/mifare-hf/mifare-plus https://www.docstore.nxp.com/
  • 6. NXP, THE NXP LOGO AND NXP SECURE CONNECTIONS FOR A SMARTER WORLD ARE TRADEMARKS OF NXP B.V. ALL OTHER PRODUCT OR SERVICE NAMES ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS. © 2020 NXP B.V.