How to Understand DUKPT: Difference between revisions

Revision as of 18:42, 15 January 2024

DUKPT is a key management method that generates a unique key for each transaction, ensuring the security of transaction-originating TRSMs (Transaction-Related Security Modules).
It is designed to prevent the disclosure of any past keys used in transactions.
The unique Transaction Keys are derived from a base derivation key, using non-secret data transmitted as part of each transaction.
DUKPT allows the encryption process to be decentralized from devices holding the shared secret.
Utilizes derived keys for encryption, which are not reused post-transaction, enhancing security.
Commonly used in electronic commerce transactions, especially for encrypting PIN information in POS (Point-Of-Sale) devices.
DUKPT is not an encryption standard but a technique for managing keys.

Distinct Transaction Keys: Ensures each transaction has a unique key, separate from others.
Security of Past and Future Keys: If a current key is compromised, previously and subsequently used keys remain secure.
No Interactive Key Agreement: Avoids the need for originators and receivers of encrypted messages to perform an interactive key-agreement protocol.

Our internal PINPad supports three types of DUKPT keys: PIN key, MAC key, and data key. Each key type is used to encrypt different types of data.

Key Injection: For information on injecting DUKPT keys, refer to How to Remotely Inject Test Keys (Master Key or DUKPT Key) into a Terminal or How to Use TMK Delivery System for KeyLoader POS and Master POS.
Usage in SDK: Details on using DUKPT keys are available in our SDK, particularly in the description of the PINPad.
Demo App: A dukpt demo application is available for download to demonstrate practical usage.

@@ Line 3: / Line 3: @@
 * It is designed to prevent the disclosure of any past keys used in transactions.
 * The unique Transaction Keys are derived from a base derivation key, using non-secret data transmitted as part of each transaction.
+* DUKPT allows the encryption process to be decentralized from devices holding the shared secret.
+* Utilizes derived keys for encryption, which are not reused post-transaction, enhancing security.
+* Commonly used in electronic commerce transactions, especially for encrypting PIN information in POS (Point-Of-Sale) devices.
+* DUKPT is not an encryption standard but a technique for managing keys.
 == Key Features of DUKPT ==
-* '''Secure Transaction Processing:''' Allows the encryption process to be decentralized from devices holding the shared secret.
-* '''Derived Keys for Each Transaction:''' Utilizes derived keys for encryption, which are not reused post-transaction, enhancing security.
-* '''Widespread Application:''' Commonly used in electronic commerce transactions, especially for encrypting PIN information in POS (Point-Of-Sale) devices.
-* '''Key Management Technique:''' DUKPT is not an encryption standard but a technique for managing keys.
 * '''Distinct Transaction Keys:''' Ensures each transaction has a unique key, separate from others.
 * '''Security of Past and Future Keys:''' If a current key is compromised, previously and subsequently used keys remain secure.