Unix (In)Security

[jbn at wdl1.UUCP]

     A secure VM kernel is indeed possible, and exists; it is called KVM/370
and was developed by Systems Development Corporation several years ago.  The
major problem with it is that it provides hard separation between virtual
machines running on the same hardware; the virtual machines cannot 
intercommunicate or share files at all.  The overhead is higher than standard
VM, but is supposedly tolerable.  It supports a DoD-type security model.