Other barriers for increasing adoption are concerns about security and privacy. With more reports in mainstream media about smart home devices being hacked, the public awareness of this issue has increased. According to Parks Associates, about half of US broadband households are worried about their connected devices being hacked, and they expect that share to be higher in Europe. F-Secure even said that if security doesn’t become better and more integrated, it could create the risk of bringing down the whole IoT business. Most importantly however, the average consumer doesn’t want to have to think about security issues, so manufacturers should make their products not only safe but easy for end-users to manage.

From the article "Smart home market still small in Europe, but with many players pushing it forward adoption will rise" by Marion ter Welle.