a network for espionage or spying

A conflict between opposing sides using spies to gather intelligence and perform covert operations; an intelligence war

espionage; spying activities

the crime of spying or engaging in espionage

Software that is installed on a computer without the user's knowledge to collect information or monitor activity.

counter-espionage; counterintelligence; protection against spying or sabotage by foreign agents

an espionage agent or spy working for Taiwan