rubber hose problem

[http://dummy.us.eu.org/robert (Robert)]

I was realizing that I may have been thinking about this wrong.  Perhaps
instead of having a single point of success or failure (the "login"), the
system should constantly be authenticating you and verifying your
identity, and start limiting you if you fall short of the authentication.

It looks like a few companies are working on that under the purview of
"behavioral biometrics" or "active authentication".  You could imagine
that the system is constantly challenging you and learning and recording
your behavior based on these challenges, and that, the longer you use the
system, the better it gets to know you and better recognize intruders.