Abstract

This paper appeared in nearly this form in the Oct. 1988 issue of Operating Systems Review, pp 36:38 Bold face stuff should be changed for greater correspondence to Unix. This is a nearly true story (unessential details have been changed). The events happened about 1977 at Tymshare, a company which provided commercial timesharing services. Before this happened I had heard of capabilities and thought that they were neat and tidy, but was not yet convinced that they were necessary. This occasion convinced me that they were necessary. It is an intricate scenario but such is the nature of computers. Our operating system was much like Unix (Ô of AT&T) in its protection structures. A compiler was installed in a directory called SYSX. A user would use the compiler by saying "RUN /SYSX/FORT", and could provide the name of a file to receive some optional debugging output. We had instrumented the compiler to collect statistics about l

Citations

13	Security in KeyKOS - Rajunas, Hardy, et al. - 1986
7	The KeyKOS Architecture" Operating Systems Review - Hardy - 1985
2	Mutually Suspicious Users (KL108 - KeyKOS - 1987