Synonyms for «covert surveillance»

undercover clandestine confidential surveillance hidden secret underground secretive deceptive unsuspecting sneaky discreet subversive overt investigative subtle underhand stealthy camera corporate targeted reconnaissance intelligence suspicious police military blind sensitive invisible security observation spot counterterrorism tactical surreptitious wiretap government stealth cyber aerial indirect illicit threat criminal transparent sensor political video sinister

monitoring investigation detection espionage camouflage scrutiny surveys tracking oversight privacy interrogation screening vigilance intrusion secrecy protection spy conspiracy techniques radar censorship tactics confidentiality coverage patrol footage communications invasion information recording hacking technology evidence detective deception veil observer network disclosure activities reports cover concealment anonymity work visibility operations informant violation data