Systems security engineering is a specialty engineering discipline of systems engineering that applies scientific, mathematical, engineering, and measurement principles, concepts, and methods to coordinate, orchestrate, and direct the activities of various security engineering specialties and other contributing engineering specialties to provide a fully integrated, system-level perspective of system security.
NIST SP 800-160 [Superseded]
Systems security engineering is a specialty engineering field strongly related to systems engineering. It applies scientific, engineering, and information assurance principles to deliver trustworthy systems that satisfy stakeholder requirements within their established risk tolerance.
See also information systems security engineering (ISSE).
(NIST SP 800-160 - (draft))