olemus
vahend, mille kaudu teave lekib süsteemist:
varjatud andmeedastuskanal ,
mis rikub turvapoliitikat
= a channel that is not meant to route information, but nevertheless does
ISO/IEC 2382:
edastuskanal, mida saab kasutada turvapoliitikat rikkuvaks andmeedastuseks
= transmission channel that may be used to transfer data in a manner that violates security policy
ISO/IEC 15408, CC:
ebaseaduslik sihilik signaalikanal, mis võimaldab kasutajal varjatult eirata hindamisobjekti mitmetasemelise eraldamise poliitikat ja jälgimatuse nõudeid
= enforced, illicit signalling channel that allows a user to surreptitiously contravene the multi-level separation policy and unobservability requirements of the target of evaluation

ülevaateid
https://en.wikipedia.org/wiki/Covert_channel
http://nob.cs.ucdavis.edu/classes/ecs235b-2011-01/slides/sli15.pdf
https://arxiv.org/pdf/1306.2252.pdf
https://www.icann.org/news/blog/what-is-an-internet-covert-channel
https://www.icann.org/news/blog/what-is-a-dns-covert-channel
https://scholarworks.rit.edu/cgi/viewcontent.cgi?filename=0&article=1784&context=other&type=additional

vt ka
- ajastuse peitkanal
- kiirguseturve