Crooks use the bitcoin blockchain to protect their botnets from takedown

Enlarge Aurich Lawson / Ars Technica When hackers corral infected computers into a botnet, they take special care to ensure they don’t lose control of the server that sends commands and updates to the compromised devices. The precautions are designed to thwart security defenders who routinely dismantle botnets by taking over the command-and-control server that …

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