Essential elements of friendly information (EEFI) are
[i]n the context of "friend or foe," . . . specific pieces of information regarding friendly (i.e., our) intentions, capabilities, and activities which are likely to be sought by our foes (i.e., our enemies/competitors).
[k]ey questions likely to be asked by adversary officials and intelligence systems about specific friendly intentions, capabilities, and activities so they can obtain answers critical to their operational effectiveness. The critical aspects of a friendly operation that, if known by the enemy, would subsequently compromise, lead to failure, or limit success of the operation, and, therefore, must be protected from enemy detection. Specific facts about friendly intentions, capabilities, and activities needed by adversaries to plan and execute effective operations against our forces.