olemus
sihikindla kohanduva kestusründe oht; põhineb suurtel ressurssidel ja erioskustel, taotleb kindlat eesmärki ning lähtub enamasti välisriigi poliitilitest, majanduslikest või sõjalistest huvidest
= the threat of a targeted adaptive duration attack that is based on large resources and special skills, pursues a specific goal and is mostly drived by the political, economic or military interests of a foreign country

ülevaateid
https://en.wikipedia.org/wiki/Advanced_persistent_threat
http://static.usenix.org/events/lisa09/tech/slides/daly.pdf
https://www.cimcor.com/blog/14-telltale-characteristics-of-an-advanced-persistent-threat
https://docs.rapid7.com/insightidr/apt-groups/

tõrje
https://www.imperva.com/learn/application-security/apt-advanced-persistent-threat/
https://www.enisa.europa.eu/topics/trainings-for-cybersecurity-specialists/online-training-material/documents/advanced_persistent_threat_incident_handling_toolset
https://www.us-cert.gov/ncas/alerts/TA18-276B
http://info.seculert.com/hs-fs/hub/237610/file-418070767-pdf/Collateral/Advanced-Persistent-Threat-Protection-For-Dummies.pdf
https://media.kaspersky.com/en/apt-protection-market-quadrant-2017.pdf