Editing Counterintelligence (section)

=== Defensive counterintelligence ===
Defensive counterintelligence starts by looking for places in one's own organization that could easily be exploited by foreign intelligence services (FIS). FIS is an established term of art in the counterintelligence community, and, in today's world, "foreign" is shorthand for "opposing." Opposition might indeed be a country, but it could be a transnational group or an internal insurgent group. Operations against a FIS might be against one's own nation, or another friendly nation. The range of actions that might be done to support a friendly government can include a wide range of functions, certainly including military or counterintelligence activities, but also humanitarian aid and aid to development ("nation building").<ref name=JP3-07.1>{{cite web
 | url = https://fas.org/irp/doddir/dod/jp3_07_1.pdf
 | title = Joint Publication 3-07.1: Joint Tactics, Techniques, and Procedures for Foreign Internal Defense (FID)
 | date = 2004-04-30
 | access-date = 2007-11-03
}}</ref>

Terminology here is still emerging, and "transnational group" could include not only terrorist groups but also transnational criminal organization. Transnational criminal organizations include the drug trade, money laundering, extortion targeted against computer or communications systems, smuggling, etc.

"Insurgent" could be a group opposing a recognized government by criminal or military means, as well as conducting clandestine intelligence and covert operations against the government in question, which could be one's own or a friendly one.

Counterintelligence and counterterrorism analyses provide strategic assessments of foreign intelligence and terrorist groups and prepare tactical options for ongoing operations and investigations. Counterespionage may involve proactive acts against foreign intelligence services, such as [[double agent]]s, [[deception]], or recruiting foreign intelligence officers. While clandestine [[HUMINT]] sources can give the greatest insight into the adversary's thinking, they may also be most vulnerable to the adversary's attacks on one's own organization. Before trusting an enemy agent, remember that such people started out as being trusted by their own countries and may still be loyal to that country.