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IA-05(02) Public Key-based Authentication

NIST SP 800-53 (controls) 5.1.1+u4
All changes in this version
first version loaded IA Moderate baselineHigh baseline part of IA-5

Title

Public Key-based Authentication

Control

(a) For public key-based authentication:
(1) Enforce authorized access to the corresponding private key; and
(2) Map the authenticated identity to the account of the individual or group; and
(b) When public key infrastructure (PKI) is used:
(1) Validate certificates by constructing and verifying a certification path to an accepted trust anchor, including checking certificate status information; and
(2) Implement a local cache of revocation data to support path discovery and validation.

Discussion

Public key cryptography is a valid authentication mechanism for individuals, machines, and devices. For PKI solutions, status information for certification paths includes certificate revocation lists or certificate status protocol responses. For PIV cards, certificate validation involves the construction and verification of a certification path to the Common Policy Root trust anchor, which includes certificate policy processing. Implementing a local cache of revocation data to support path discovery and validation also supports system availability in situations where organizations are unable to access revocation information via the network.

Related controls

ia-3, sc-17

STIG rules that implement this control 48

Apple macOS 15 (Sequoia) V1R8

Apple macOS 26 (Tahoe) V1R4

Application Security and Development V6R5

Canonical Ubuntu 22.04 LTS V2R10

Canonical Ubuntu 24.04 LTS V1R7

Google Chrome Current Windows V2R11

Microsoft Edge V2R5

Microsoft Windows 11 V2R11

Microsoft Windows Server 2022 V2R11

Microsoft Windows Server 2025 V1R4

Mozilla Firefox V6R9

Red Hat Enterprise Linux 10 V1R3

Red Hat Enterprise Linux 9 V2R10

Samsung Android 16 COBO Y26M10