olemus
(a) ohtlikult alalt eemaldama
Merriam-Webster:
1. to remove (someone) furtively from a hostile area //
Kublinski avoided detection. He was exfiltrated from Poland, with his family, only after being compromised by a leak from the U.S. government.
https://en.wikipedia.org/wiki/Extraction_(military)

(b) vt
- andmeleke
- andmevargus
- infoleke

(c) füüsiliselt välja imbuma
Wiktionary:
exfiltration
3. (sciences) a filtering out (usually movement of a substance through a barrier)