With the internet of things, devices are getting smaller, smarter and – we hope – safer. It’s not easy to make all those things happen at once, but chips that can help are starting to emerge.

On Tuesday at ARM TechCon in Silicon Valley, ARM will introduce processors that are just a fraction of a millimeter across and incorporate the company’s TrustZone technology. TrustZone is hardware-based security built into SoC (system on chip) processors to establish a root of trust.

The technology is designed to prevent devices from being hacked and taken over by intruders, a danger that’s been in the news since the discovery of the Mirai botnet, which took over thousands of IP cameras to mount denial-of-service attacks last week.

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