The Security Model of Not Being Single

There is a certain kind of security model that only works when you are single.

I don't mean single in the romantic drama sense. I mean single as in being the only real user of your systems. The only person who needs to understand your network, your devices, your password manager, your DNS setup, your backups, your home server, your VPN, your weird SSH keys, and the fact that sometimes the internet is down because you decided to update PiHole/Adguard Home at 1 AM and something goes wrong.

When you live alone as a tech nerd, you can optimize your life around a very strange set of priorities. You can make decisions that are technically elegant, privacy preserving, educational, and completely unreasonable for normal people. You can self-host as much as possible. You can run your own password manager, your own DNS resolver, your own media server, your own monitoring stack, your own reverse proxy, your own file sync system, your own photo backup, and maybe even your own email if you are brave enough or foolish enough.

This can be great. It gives you control. It reduces dependency on third parties. It teaches you a lot. It makes your digital life feel like something you own rather than something you rent.

But it also works because the user interface is you.

You know that the service might be down after an update. You know that the password manager is behind a private tunnel. You know that some apps only work on the home network. You know why the DNS blocks some tracking domains. You know why a website breaks when it depends on an ad server or analytics script. You know how to bypass the problem temporarily. You know where the recovery codes are. You know which machine is the reverse proxy. You know which container needs to be restarted.

Now add another person and suddenly the security model changes. Your partner does not want to debug DNS at dinner. Your partner does not care that the home network blocks ads at the router level using a custom resolver. They care tha…