[Saltmarsh83] T. Saltmarsh and P. Browne, The Protection of Information in Computer Systems Jerome H. Saltzer, Senior Member, IEEE, and Michael D. Schroeder, Member, IEEE Fourth ACM Symposium on Operating System Principles (October 1973). Revised version in Communications of the ACM 17, 7 (July 1974). Computer Security Management, 2, 1983 []