[zizzles]

How resilient will the Hyperloop be against terrorist attacks?

It is situated above ground. This means the tubing is exposed to all and everyone. In other words, it is vulnerable to homemade explosives which can perhaps obstruct the path the vessel transverses. Sounds far-fetched, but the lengths extremists go to can not be undermined as we have learned time and time again throughout history.

I am interested in the security protocols more so than anything else.

[the_watcher]

This is a valid concern, but it's definitely not one that should impede efforts to construct one or prove its viability. For one, hyperloops have a lot of potential value for shipping. For another, most of the designs don't seem to involve a huge number of people in on point at once, and it wouldn't be hijackable in the way than an aircraft is. To be honest, the simplest form of transit to use in terms of ease of access combined with potential destruction is just a car or bus, right?

[niftich]

It's at least equally vulnerable as conventional rail, but more vulnerable than aircraft, which are usually out of reach of improvised weapons and are usually surrounded with some cursory security on the ground.