A trusted entity that issues or registers subscriber authenticators and issues electronic credentials to subscribers. A CSP may be an independent third party or issue credentials for its own use.
Source(s):
NIST SP 1800-17c under Credential Service Provider
NIST SP 800-63-3 under Credential Service Provider (CSP)
NISTIR 8149 under Credential Service Provider (CSP) from NIST SP 800-63-3

  The party that manages the subscriber’s primary authentication credentials and issues assertions derived from those credentials. This is commonly the CSP as discussed within this document suite.
Source(s):
NIST SP 800-63-3 under Identity Provider (IdP)

  See Credential Service Provider.
Source(s):
NISTIR 8149 under Federation Credential Service Provider
NISTIR 8149 under Identity Provider (IdP)
NISTIR 8149 under Identity Service Provider (ISP)

  A trusted entity that issues or registers subscriber tokens and issues electronic credentials to subscribers. The CSP may encompass registration authorities (RAs) and verifiers that it operates. A CSP may be an independent third party, or may issue credentials for its own use.
Source(s):
CNSSI 4009-2015 [Superseded] from NIST SP 800-63-2

  A trusted entity that issues or registers Subscriber tokens and issues electronic credentials to Subscribers. The CSP may encompass Registration Authorities (RAs) and Verifiers that it operates. A CSP may be an independent third party, or may issue credentials for its own use.
Source(s):
NIST SP 800-63-2 [Superseded] under Credential Service Provider (CSP)