olemusturvanõuete ja -tavade süsteemnäiteidhttps://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/882764/dwp-ss010-security-standard-desktop-operating-system-v1.1.pdfhttps://inldigitallibrary.inl.gov/sites/sti/sti/3480251.pdf
security standard (2)
turvanorm