Learn in the textbookDenial-of-Service, Zero-Day, and Attacks Targeting AI
DefinitionA DDoS attack (DDoS攻撃), or distributed DoS attack, takes a service down by having many attacker-controlled devices send massive traffic to the same target at once.
ExplanationThe attacker first infects many devices with a bot, a malicious program that can take orders from outside. When the bots receive a command from the attacker's command server, they all start sending traffic to the chosen target at the same time. Because the traffic comes from so many scattered devices, blocking a few sources does little to stop the attack.
AnalogyPicture a single signal sending crowds from every direction to the entrance of one shop, so that real customers cannot get in.
Memory hookThe leading D is for Distributed: add one D to DoS and the attack sources spread out.