People who make Internet of Things (IoT) devices still aren’t getting the message on security. And as these devices proliferate, the danger of increased attacks is getting more real.Late last year, popular internet services such as Netflix and Twitter were temporarily taken down amid a massive distributed denial-of-service (DDoS) attack that involved hackers deploying malware to simple webcams that many of us use without thinking. Authorities in the U.S. and U.K. were investigating the Mirai malware used in the attack to create a botnet, an army of zombie devices commanded by hackers. In fact, the Mirai code is still available online, allowing those with only modest technical skills to continue disrupting internet services on a major scale.