13-08-2012, 02:15 PM
Protection
Goals of Protection
Operating system consists of a collection of
objects, hardware or software
Each object has a unique name and can be
accessed through a well-defined set of operations.
Protection problem - ensure that each object is
accessed correctly and only by those processes
14.4 Silberschatz, Galvin Operating System Concepts with Java – 7th Edition, Nov 15, 2006 and Gagne ©2007
that are allowed to do so.
Guiding principle – principle of least privilege
Programs, users and systems should be given just
enough privileges to perform their tasks