دسته بندی : پاورپوینت نوع فایل: ppt _ pptx ( قابلیت ویرایش ) قسمتی از اسلاید پاورپوینت : تعداد اسلاید : 13 صفحه November 1, 2004 Introduction to Computer Security ©2004 Matt Bishop Slide #27-1 Chapter 27: Lattices Overview Definitions Lattices Examples November 1, 2004 Introduction to Computer Security ©2004 Matt Bishop Slide #27-2 Overview Lattices used to analyze Bell-LaPadula, Biba constructions Consists of a set and a relation Relation must partially order set Partial ordering < orders some, but not all, elements of set November 1, 2004 Introduction to Computer Security ©2004 Matt Bishop Slide #27-3 Sets and Relations S set, R: S S relation If a, b S, and (a, b) R, write aRb Example I = { 1, 2, 3}; R is ≤ R = { (1, 1), (1, 2), (1, 3), (2, 2), (2, 3), (3, 3) } So we write 1 ≤ 2 and 3 ≤ 3 but not 3 ≤ 2 November 1, 2004 Introduction to Computer Security ©2004 Matt Bi …
