Software assurance

The level of confidence that software is free from vulnerabilities, either intentionally designed into the software or accidentally inserted at any time during its lifecycle, and that the software functions in the intended manner. (NIST SP 800-163).

Source: Explore Terms: A Glossary of Common Cybersecurity Terminology, National Initiative for Cybersecurity Careers and Studies (NICCS),; NSTAC Report to the President on a Cybersecurity Moonshot, National Security Telecommunications Advisory Committee (NSTAC),