The architecture, organization, techniques, practices, and procedures that collectively support the implementation and operation of a certificate-based public key cryptographic system. Framework established to issue, maintain, and revoke public key certificates.
Sources:
NIST SP 800-53 Rev. 5
under public key infrastructure
from
CNSSI 4009-2015
A support service to the PIV system that provides the cryptographic keys needed to perform digital signature-based identity verification and to protect communications and storage of enterprise data.
Sources:
NIST SP 1800-12b
under public key infrastructure
A set of policies, processes, server platforms, software and workstations used for the purpose of administering certificates and public-private key pairs, including the ability to issue, maintain, and revoke public key certificates.
Sources:
NISTIR 7711
under Public Key Infrastructure