An oft-forgotten 90s-era communications protocol now becoming prevalent in the Internet of Things realm can easily be manipulated via the public Internet to snoop on and even sabotage power plant equipment, ATM machines, and other connected devices. Security researcher Lucas Lundgren via an Internet scan last year found around 65,000 IoT servers using the Message Queuing Telemetry Transport (MQTT) worldwide on the public Internet wide open to attack with no authentication nor encrypted communication, findings he revealed last August at DEF CON.

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