olemus
(1) riigiasutus vastuluure ja sisejulgeoleku ülesannetega,
kontekstist ja õigusruumist sõltuvas tähenduses
näiteid:
- FBI
- FSB
- Kaitsepolitseiamet
- NSA
- http://www.dss.mil/
- https://www.mi5.gov.uk/

https://en.wikipedia.org/wiki/Security_agency

https://en.wikipedia.org/wiki/Secret_police

https://en.wikipedia.org/wiki/Security_agency#List_of_security_agencies

https://www.google.com/maps/d/viewer?mid=18Ea8dzSXVx-5gqaHSQekIeiAig8&msa=0&ll=47.80684619105971%2C12.304687999999942&spn=143.185831%2C10.898438&z=2

https://en.wikipedia.org/wiki/Estonian_Internal_Security_Service

(2) turvafirma
https://en.wikipedia.org/wiki/Security_company
näiteid:
https://www.securitydegreehub.com/most-powerful-private-security-companies-in-the-world/
Eestis:
https://turvamees.ee/turvaettevotted/