Australian Transaction Key Scheme (ATKS)

 commands via the Host port:

Terminal-to-acquirer requests:

·         Transaction request without a PIN. Used to receive a cardholder request message from a terminal with no PIN.

·         Transaction request with PIN (T/AQ key). Used to receive a cardholder request message from a terminal with a PIN encrypted under the T/AQ key.

·         Transaction request with PIN (T/CI key). Used to receive a request from the terminal when the PIN key cannot be determined by the acquirer.

Acquirer-to-terminal responses:

·         Transaction response originating at the acquirer. Used when authorization is generated by the acquirer.

·         Transaction response originating at the card issuer. Used when authorization is generated at the card issuer.

Acquirer PIN translation:

·         Translate a PIN from encryption under the PEK to encryption under a ZPK.

Acquirer completion:

·         Verify completion confirmation message from terminal. Used to verify the MAC on a confirmation message from the terminal.

·         Generate completion response.

Card issuer support:

·         Verify a PIN at the card issuer using one of the following methods:

IBM.

Diebold.

Visa.

Comparison.

Generate authorization at the card issuer.

Binary message authentication:

·         Generate a MAC on a binary message.

·         Verify a MAC on a binary message.

The commands RI, RK, RM, RO, RQ, RS and RU are only available when Racal Transaction Key Scheme is selected using the CS (Configure Security) console command.