フィクサー
フィクサー（）は、政治・行政や企業の営利活動における意思決定の際に、正規の手続きを経ずに決定に対して影響を与える手段・人脈を持つ人物を指す。
防諜
A double agent is a person who engages in clandestine activity for two intelligence or security services (or more in joint operations), who provides information about one or about each to the other, and who wittingly withholds significant information from one on the instructions of the other or is unwittingly manipulated by one so that significant facts are withheld from the adversary. Peddlers, fabricators, and others who work for themselves rather than a service are not double agents because they are not agents. The fact that doubles have an agent relationship with both sides distinguishes them from penetrations, who normally are placed with the target service in a staff or officer capacity.