>Having worked in the space I came to the conclusion the only viable secure future is to adopt star topology local networks where local traffic for all devices

>Having worked in the space I came to the conclusion the only viable secure future is to adopt star topology local networks where local traffic for all devices goes into a single secure regularly updated broker device that then decides what to do with it. Any access out to the Internet or between devices needs to be mediated. Yes, yours is (IMHO) the only possible way out, still there are things that simply should be not allowed or be only optional, as I see it the "mistake" is confounding the "Internet" in IoT with the "Cloud".