Hackers can hijack grocery store freezers. What about our homes?

In October, hundreds of French stores were targeted in a similar attack that sent temperatures in some units soaring to 122° Fahrenheit, destroying a huge amount of food. On Wednesday, France's health service said the country's national emergency blood supply network had also been compromised by hackers this week, though alert and backup systems prevented cold storage facilities from being shut down, and no supplies were lost. The incidents have renewed wider concerns about the vulnerability of critical infrastructure and the growing risks of internet-connected consumer "smart" technology. It is not just essential systems such as electricity grids, healthcare databases and grocery store chains' refrigeration, which can have multiple layers of security and redundancy built in, but everyday appliances that are now connected to the internet.