>I think some if not most of the devices that plug into "popular ports" are pass-through i.e. you can continue to use the ports, they just get extended some distance outward. Like the old parallel port dongles used for copy protection.

Yes, I remember that. That is interesting.

>Some more ideas at http://superuser.com/questions/555373/ways-to-physically-secure-laptop-that-has-no-kensington-lock .

Another interesting link, thanks

The thing with those approaches is that it requires glue to put together the laptop and the locking mechanism. That one is highly high and would be somewhat of a trouble whenever I have to move the laptop from one place to another. Also, the Sony VAIO Duo 13 cannot handle that as the part on the back is the part sitting on the desk. The screen, when not opened, is as if it would be a tablet.