About this interactive
What you are doing: naming the attack from what the attacker does.
Denial of service: users cannot reach the service. It is disruptive, a flood or a crash, and the server's users and owners both suffer.
Eavesdropping: listening in, in person or on network traffic, without changing anything.
Spoofing: pretending to be some other device or person: a server, a printer, the CEO's email address, the bank's phone number.
Adversary in the middle: the attacker sits between two parties, so traffic that should go straight between them goes through the attacker, who passes it on and can change it.
The lesson stresses that these overlap. An adversary in the middle often spoofs each side to get there and eavesdrops once there. Each card here shows one of the four on its own: an attacker who relays and alters traffic between two parties is in the middle; one who only listens is eavesdropping; one who only pretends is spoofing.
How to use it: ask what the attacker is doing to the traffic or the service: stopping it, hearing it, faking its source, or standing in its path.
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