attack by computer operation type by degree of secrecy is a subset of attack by computer operation type. Every instance of this collection is a collection of attacks whose degree of secrecy is significantly related to their potenital success. For example, some attacks must be conducted in such a way that discourages detection of the attack as the attack is occurring. Obviously, all 'sensible' electronic attacks will be conducted by the attacker in a manner that is intended to disguise the source of the attack, who conducted it, and so on. What makes an electronic attack 'covert' is the additional principle stated above. For an attack that is 'highly covert', see electronic intelligence attack for the purpose of espionage.