Security in Computing 5th Edition by Shari Lawrence Pfleeger, Charles P Pfleeger, Jonathan Margulies

Exercise 1

(a) In an environment in which several users share access to a single database, can one user ever block another’s access for an unlimited period of time? (This situation is called indefinite postponement.) (b) Describe a scenario in which two users could cause the indefinite postponement of each other. (c) Describe a scenario in which a single user could cause the indefinite postponement of all users.