olemus
hoideolekus andmed, erinevalt edastusel või kasutusel olevaist
= data stored on a device or backup medium in any form
ISO/IEC 27040:
stabiilsesse säilmällu salvestatud andmed
= data stored on stable non-volatile storage

ülevaateid
https://en.wikipedia.org/wiki/Data_at_rest
http://aspg.com/three-states-digital-data/#.X04roXVfhhc
https://www.imperva.com/learn/data-security/data-at-rest/
https://www.teradata.com/insights/data-security/data-at-rest