Answered: e a BLP lattice–structured system where…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Generate a BLP lattice–structured system where the objects and subjects are appropriately levelled
to give access consistent with the access control matrix below. You need to describe the process by
which you obtain your lattice. R and W correspond, respectively, to read and append. You are to
use only the mandatory BLP rules, and a default allow in place of the discretionary rule. Be sure to
add a level as necssary to ensure this is a lattice.

0₁ 0₂ 03 04 05 06
RRRRW
W
S₁RR
S₂
R
S3 R RW RW
S₁ R
S5 R
S6 R
R R
R
W
W
R
W
W
W

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