Cryptocurrency ransom demands popped up in recent cyberattacks

One of the most common, and irritating, cyberattacks — the distributed-denial-of-service (or DDoS) — now has the potential to come with a twist of cryptocurrency mining.
Security researchers with the internet services company Akamai have noticed something unusual as they've responded to a spate of recent DDoS attacks. Buried beneath the traffic deluge designed to grind a target's web traffic to a halt are ransom notes.
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