Zero-Rating

Expiry Date is the month and year printed on a payment card, indicating when the card becomes invalid and must be replaced.

ZKP is a cryptographic method that allows one party to prove knowledge of information without revealing the information itself, used in advanced authentication and privacy-preserving payment solutions.

ZIP is a buy now, pay later (BNPL) service offering instalment-based payments for online and in-store purchases.

The secure deletion of cryptographic keys and sensitive data from hardware security modules (HSMs) or other secure devices to prevent unauthorised use.

An authorisation request for a value of £0 used to validate a card before charging it. It confirms card validity without reserving funds.

A Zero-Day Vulnerability is a security flaw that is unknown to the system vendor and has no available patch, posing high risk to payment systems and infrastructure.