One of the most effective ways to gather data and information about the enemy (or potential enemy) is by infiltrating the enemy's ranks. This is the job of the spy (espionage agent). Spies can bring back all sorts of information concerning the size and strength of enemy forces. They can also find dissidents within the enemy's forces and influence them to defect. In times of crisis, spies can also be used to steal technology and to sabotage the enemy in various ways. Counterintelligence operatives can feed false information to enemy spies, protecting important domestic secrets, and preventing attempts at subversion. Nearly every country has very strict laws concerning espionage, and the penalty for being caught is often severe. However, the benefits that can be gained through espionage are generally great enough that most governments and many large corporations make use of it to varying degrees.