Espionage has been recognized as of importance in military affairs since ancient times.
The oldest known classified document was a report made by a spy disguised as a See more

Today, spy agencies target the illegal drug trade and terrorists as well as state actors.
Intelligence services value certain intelligence collection techniques over others. The former … See more

Espionage agents are usually trained experts in a targeted field so they can differentiate mundane information from targets of value to their own organizational development. … See more

Although the news media may speak of "spy satellites" and the like, espionage is not a synonym for all intelligence-gathering disciplines. It is a specific form of human source intelligence ( See more

A spy is a person employed to seek out top secret information from a source. Within the United States Intelligence Community, "asset" is more common usage. A See more

Reportedly Canada is losing $12 billion and German companies are estimated to be losing about €50 billion ($87 billion) and 30,000 jobs to industrial espionage every year. See more

In espionage jargon, an "agent" is the person who does the spying. They may be a citizen of a country recruited by that country to spy on another; a citizen of a country recruited by … See more