As Amazon introduces a new smart-home device aimed at children, it's important to know many internet-connected toys are not secure, putting kids' security and privacy at risk.
Mine communications are complex, slow and unreliable. The solution to keeping miners safe, and rescuing them when disaster strikes, might just be in their hands already.
There are billions of wireless devices around the world and every one has a unique fingerprint. That can be very useful if a device is stolen.