Blockchain could help fix IoT security after DDoS attack

GUEST: Chinese electronics manufacturer Hangzhou Xiongmai is in deep trouble. Its products are being blamed for having enabled last Friday’s historical DDoS attack, which shut down access to important websites across swathes of the U.S. and Europe and has caused a stir about IoT insecurity.
Aside from the blow to its reputation, the firm has to deal with recalling thousands of devices that researchers say might have been instrumental to the attack. The problem is that product recalls are e