[pfg]

> You could imagine a privilege escalation that gives you access to the loopback interface but not enough to install a key-logger.

That's a weird thing to say. If you manage to bypass file system access rules, there's any number of ways you can get access to the password manager.

I'm not convinced that any measure 1Password could take to make this harder would amount to more than mere obfuscation, with the cost of additional complexity (and attack surface).