A cloud administrator is building a company's payment system in the public cloud. Which of the following security standards is the cloud administrator MOST likely to apply to comply with industry…

PKI (Public Key Infrastructure) is a system for creating, managing, and distributing digital certificates to verify identity, which is a component of security but not an overarching industry standard for payment systems.

PCI DSS (Payment Card Industry Data Security Standard) is a set of security standards designed to ensure that all companies that process, store, or transmit credit card information maintain a secure environment. Implementing PCI DSS is a mandatory requirement for any organization, including those operating in the cloud, that handles payment card data to protect against data breaches and fraud.

PII (Personally Identifiable Information) refers to data that can be used to identify an individual, and while important for data privacy, it is a type of data, not a security standard specifically for payment systems.

PSK (Pre-Shared Key) is a cryptographic key that has been securely exchanged between two parties beforehand, often used for authentication in VPNs or Wi-Fi, but it is not an industry-wide compliance standard for payment processing.