Enlarge (credit: Aurich Lawson / Getty) In August and September, threat actors unleashed the biggest distributed denial-of-service attacks in Internet history by exploiting a previously unknown vulnerability in a key technical protocol. Unlike other high-severity zero-days in recent years— Heartbleed or log4j, for example—which caused chaos from a torrent …

Enlarge (credit: Aurich Lawson / Getty) The protracted arms race between criminals who wage distributed denial-of-service attacks and the defenders who attempt to stop them continues, as the former embraces “alarming” new methods to make their online offensives more powerful and destructive, researchers from content-delivery network Cloudflare reported Wednesday. With …