Security Domain definition in Computer Security terms:
Definition(s): A domain that implements a security policy and is administered by a single authority.
Source(s): CNSSI 4009-2015 (CNSSP No. 24, CNSSI 1253F Attachment 3)
NIST SP 800-137 (CNSSI 4009)
NIST SP 800-37 Rev. 1 (CNSSI 4009)
NIST SP 800-53 Rev. 4 (CNSSI 4009)
A collection of entities, including their CKMS, in which each CKMS operates under the same security policy ? known as the Domain Security Policy.
Source(s): NIST SP 800-130
A system or subsystem that is under the authority of a single trusted authority. Security domains may be organized (e.g., hierarchically) to form larger domains.
Source(s): NIST SP 800-57 Part 1 Rev. 3
reference: CSRC Glossary