Application and analysis of the virtual machine approach to information system security and isolation
Stuart Madnick, John J. Donovan · 1973
Security is an important factor if the programs of independent and possibly malicious users are to coexist on the same computer system. In this paper we show that a combined virtual machine monitor/operating system (VMM/OS) approach to information system isolation provides substantially better software security than a conventional multiprogramming operating system approach. This added protection is derived from redundant security using independent mechanisms that are inherent in the design of most VMM/OS systems.