If we take as given that critical infrastructures are vulnerable to a cyber terrorist attack, then the question becomes whether there are actors with the capability and motivation to carry out such an operation.

However, leaving everything to the market is not necessarily good for society.

While the vast majority of hackers may be disinclined towards violence, it would only take a few to turn cyber terrorism into reality.

Systems are complex, so controlling an attack and achieving a desired level of damage may be harder than using physical weapons.

I think most organizations have an interest in key recovery, at least with respect to stored data.

While many hackers have the knowledge, skills, and tools to attack computer systems, they generally lack the motivation to cause violence or severe economic or social harm.

Although cyber attacks have caused billions of dollars in damage and affected the lives of millions, few if any can be characterised as acts of terrorism.