Right now, skilled adversaries are probing its defences seeking a way in. They are swift, relentless and smart. No weakness will escape their notice. But I am not without defences. I've tried to harden the most vulnerable devices to stop them being compromised and I've set up warning systems that should alert me if the attackers get inside. In the end, all that effort was for nothing because the attackers found so many ways to get at me and my home network. And, they said, even if the technology had defeated them, the weakest link of all - me - would probably have let them in.