Here is the glossary of terms related to CyberSource payment gateway:

1. ACQUIRING PROCESSOR - A financial entity that processes payments and provides payment processing services to merchants.
2. ACTIVATION CODE - A unique code sent to the merchant after enrollment for decoding and decrypting the PARes.
3. AFFECTED TRANSACTION - The transaction being authenticated or verified by the card-issuing bank.
4. AMERICAN EXPRESS (AE) - A trademarked name for the American Express card authentication service.
5. AUTHORIZATION - The process of verifying that the cardholder has sufficient funds to complete a transaction.
6. CARD ISSUING BANK - The financial institution that issues the credit or debit card.
7. CYBER Source - A payment gateway provider that offers payment processing services to merchants.
8. DIRECTORY SERVERS - The servers that store and manage card authentication data for participating merchants.
9. ENROLLMENT - The process of registering a merchant's account with CyberSource to enable payment processing capabilities.
10. EXPIRED CARD - A credit or debit card that has passed its expiration date.
11. MERCHANT ID - A unique identifier assigned to each participating merchant by CyberSource.
12. MERCHANT ACCOUNT - The account used by a merchant to process payments through CyberSource.
13. MPI (MERCHANT PLUG-IN) - Software used to connect to Directory Servers and decrypt the PARes.
14. ON-LINE TRANSACTION - A transaction that takes place on the internet or other computer network.
15. ORGANIZATION (ORG) - The entity that sponsors a card-issuing bank or acquiring processor.
16. OUTSIDE ACCOUNT - A bank account used by a merchant to process payments through CyberSource.
17. PARes (PAYER AUTHENTICATION RESPONSE) - Compressed, Base64-encoded response from the card-issuing bank that contains the authentication status of the payer.
18. PARA (PAYER AUTHORIZATION REQUEST) - Digitally signed Base64-encoded message sent by a merchant to the card-issuing bank for payer authentication.
19. PIN (Personal Identification Number) - A secret code entered by the cardholder to verify their identity when making a purchase.
20. PROCESSOR FINANCIAL ENTITY - A financial entity that processes payments and provides payment processing services to merchants.
21. RISK-BASED AUTHENTICATION - The process of verifying the cardholder's identity based on factors such as spending habits, order or product velocity, device IP address, order amount, etc.
22. SCMP (Simple Order API) - An API that provides three ways to access services: name-value pair (NVP), XML, and SOAP.
23. SIDE (SPECIFIC TRANSACTION IDENTIFIER) - A unique identifier assigned to each transaction on the Directory Servers.
24. TERMINATION URL (TERM URL) - The URL on a merchant's website where the card-issuing bank posts the payer authentication response message.
25. UCAF (UNIVERSAL CARDHOLDER AUTHENTICATION FIELD) - A Base64-encoded string sent back with Mastercard Identity Check-enrolled cards specifically identifying the transaction with the issuing bank and Mastercard.
26. VEReq (VERIFY ENROLLMENT REQUEST) - Request sent to Directory Servers to verify that a card is enrolled in a card authentication service.
27. VERes (VERIFY ENROLLMENT RESPONSE) - Response from Directory Servers to the VEReq.
28. XID (UNIQUE TRANSACTION IDENTIFIER) - A unique identifier assigned to each transaction on the Directory Servers, which should remain consistent throughout a transaction's history.