Control Objective 5: Keys are used in a manner that prevents or detects their unauthorized usage – PCI PIN Security
PCI PIN Security 21-3.1: PCI PIN 21-3.1
What does 21-3.1 require?
Each clear-text component held outside an SCD is sealed on its own in packaging that is opaque, pre-numbered, tamper-evident and authenticable, so that it cannot be read, whether by embossing, contactless means or otherwise, without leaving visible damage.