PCI-DSS Serverless Payments on GCP: Confidential VMs, CEKM & Binary Authorization

Designing a PCI-DSS compliant serverless payments architecture on GCP means getting Confidential VMs, Cloud External Key Manager, and Binary Authorization working together — here's how to answer that in a senior interview.

You'll learn:

• How Confidential VMs provide hardware-level memory encryption to satisfy PCI-DSS data-in-use requirements
• Why Cloud External Key Manager (CEKM) lets you hold encryption keys outside GCP's control — and what that means for scope reduction
• How Binary Authorization enforces cryptographic attestation so only verified container images reach your payment workloads
• The serverless boundary decisions (Cloud Run vs bare GKE) that affect your Cardholder Data Environment scope
• Common interview gotchas around shared responsibility, audit logging with Cloud Audit Logs, and VPC Service Controls for perimeter defence

Keywords: PCI-DSS GCP architecture, Confidential VMs interview, Cloud External Key Manager, Binary Authorization Cloud Run, serverless payments compliance

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