olemus
salajane elektrooniline pealtkuulamine sideliinil, kõne või andmete jälgimiseks ja/või salvestuseks
Wiktionary, wiretap, noun:
a connection installed on a telephone line or other communications system in order to allow a third party to conduct covert surveillance of conversations

ülevaateid
https://en.wikipedia.org/wiki/Telephone_tapping
https://adambates.org/courses/cs598-fa16/slides/cs598-13-slides-signaling.pdf
https://www.cl.cam.ac.uk/research/security/seminars/archive/slides/2013-12-23.pdf
https://elibrary.law.psu.edu/cgi/viewcontent.cgi?article=1025&context=fac_books
https://fas.org/sgp/crs/intel/98-326.pdf
https://datatracker.ietf.org/doc/html/rfc2804

näiteid
https://www.nyclu.org/en/nsa-warrantless-wiretapping-timeline

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