https://www.cnet.com/news/congress-introduces-bill-to-improve-internet-of-things-security/

Connected devices are expected to boom to 20.4 billion units by 2020, but they don't all have the same levels of security. Hackers often target IoT devices that don't have built-in security, leading to problems like default passwords and vulnerabilities that can't be fixed.

At a Senate hearing last year, Lt. General Robert Ashley, director of the Defense Intelligence Agency, told lawmakers that insecure IoT devices are one of the "most important emerging cyberthreats" to US national security.