ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question
A fintech startup is preparing to deploy a payment-processing microservice that will store primary account numbers (PANs). The product manager proposes postponing the PCI DSS encryption-at-rest requirement to accelerate the release schedule. From an operational risk standpoint, which outcome represents the most immediate consequence of adopting this plan?
Transaction latency would rise due to added computational load during encryption operations.
Deployment complexity would be reduced, thereby lowering the chance of configuration-related outages without major security trade-offs.
The service would be immediately out of compliance with PCI DSS, increasing the likelihood of fines and forced breach disclosure if data is exposed.
Liability for any cardholder-data breach would shift to the acquiring bank, leaving the startup with minimal direct consequences.
Postponing encryption of stored cardholder data violates PCI DSS Requirement 3, which mandates protecting PANs with strong cryptography whenever they are written to persistent storage. Operating a system that knowingly fails this control puts the organization in an out-of-compliance status on day one, exposing it to regulator or card-brand fines, potential revocation of the right to process payments, and mandatory breach-notification obligations if data is compromised. The proposal does not increase runtime overhead because encryption would be absent; it does not lower risk simply by reducing deployment complexity; and liability for a breach remains with the merchant, not fully transferred to the acquiring bank.
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What is PCI DSS Requirement 3?
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ISC2 Certified Secure Software Lifecycle Professional (CSSLP)