Denial of service and Distributed Denial of Service [DDoS] attacks overwhelm a server with so much traffic that it can’t cope and just becomes unusable, sometimes even shutting down. These attacks don’t require compromising the target system—everything is done by flooding the system with traffic from the outside. Economic Denial of Sustainability [EDoS] attacks are more subtle—they generate huge volumes of traffic without shutting down the targeted systems, but cause the attacked organization to have to scale up the size or number of servers, thus increasing what it costs them to stay online.
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EDoS attacks are becoming more common now that organizations are hosting their sites in cloud server environments where the size of the server may even scale up automatically, without human intervention. |