I don't know of any explicit follow up, but there is a ton of interesting info at multicians.org.
I think that, for multi-million dollar mainframe timesharing systems, it was easier to make the cost argument for good security, since the customer would pay for it so that they could spread out the cost of the machine on many users, between whom there was no trust.
But once you got $100k minis and $10k single user micros, why not just buy a second machine?
Of course, things turned out a little bit differently, but from a time before the ubiquitous internet, I can see it making sense to many people.
It's amazing how much more diverse the hardware/OS ecosystem was in say 1985 than it is now. A lot of good stuff has happened since then, but I think a lot of good ideas got lost, or at least are waiting to be dug up again.
I think that, for multi-million dollar mainframe timesharing systems, it was easier to make the cost argument for good security, since the customer would pay for it so that they could spread out the cost of the machine on many users, between whom there was no trust.
But once you got $100k minis and $10k single user micros, why not just buy a second machine?
Of course, things turned out a little bit differently, but from a time before the ubiquitous internet, I can see it making sense to many people.
It's amazing how much more diverse the hardware/OS ecosystem was in say 1985 than it is now. A lot of good stuff has happened since then, but I think a lot of good ideas got lost, or at least are waiting to be dug up again.