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3.6.1.3 Access to cleartext cryptographic key components

Original requirement from PCI DSS v4.0.1

Defined Approach Requirements

3.6.1.3 Access to cleartext cryptographic key components is restricted to the fewest number of custodians necessary.

Customized Approach Objective

Access to cleartext cryptographic key components is restricted to necessary personnel.

Defined Approach Testing Procedures

3.6.1.3 Examine user access lists to verify that access to cleartext cryptographic key components is restricted to the fewest number of custodians necessary.

Purpose

Restricting the number of people who have access to cleartext cryptographic key components reduces the risk of stored account data being retrieved or rendered visible by unauthorized parties.

Good Practice

Only personnel with defined key custodian responsibilities (creating, altering, rotating, distributing, or otherwise maintaining encryption keys) should be granted access to key components.

Ideally this will be a very small number of people.

purpose

Store cryptographic keys securely.

compliance strategies

  • HSMs, encrypted key stores
  • Access controls

typical policies

  • Key Storage Policy

common pitfalls

  • Keys stored in plaintext
  • No access controls

type

Technical Control

difficulty

High

key risks

  • Key theft from insecure storage

recommendations

  • Store keys in HSMs or encrypted files

Eligible SAQ

  • SAQ-D MERCHANT
  • SAQ-D SERVICE PROVIDER

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