! UPCOMING PLANNED SYSTEM MAINTENANCE:

We are migrating our systems to a cloud environment to enhance the service we provide. The site will be unavailable on September 9, 2020, and will be back online by 8:00 AM ET on September 10, 2020. We appreciate your patience during this downtime. If there are any questions about this downtime, please email AUUserSupport@Hq.Doe.Gov or call (800) 473-4375. Thank you.
Terms and definitions used in the Glossary reflect current safeguards and security terminology. It is not intended that the definitions imply or be construed as establishing requirements. Since some terms have different definitions depending on the topical area, each definition includes, when possible, the programmatic area and source document. General terms defined in dictionaries have been intentionally omitted. Recommendations for revisions to this Glossary are encouraged and should be submitted to the Office of Security using the link in the footer.