The Red Team, by definition, is an adversary team designed to replicate tactics that terrorists might use against their targets. Red Team activity is normally associated with assessing vulnerabilities and limitations of systems or structures. These days various government agencies such as aviation security administrations and Nuclear Security Administrations employ red teams on a frequent basis.
Red Team activity is any set of activities that deal with an unannounced assessment (covert) of security and readiness by an unfamiliar (to the target) team of operators with no awareness or support from the assessed target. The function of individuals engaged in this activity is to provide a unique understanding from a threat actor’s point of view in a less contrived circumstance than through exercises, role playing, or announced assessments. Red Team activities may involve interactions that trigger active controls and countermeasures in effect within a given operational environment.