Type Name Level Object Obj1 (H, {A}) Object Obj2 (L, {B}) Object Obj3 (L, {A,B})
ID: 652286 • Letter: T
Question
Type
Name
Level
Object
Obj1
(H, {A})
Object
Obj2
(L, {B})
Object
Obj3
(L, {A,B})
Subject
Subj1
(L, {A,B})
Subject
Subj2
(H,{B})
Subject
Subj3
(H,{A,B,C})
Suppose you have a secure system with three subjects and three objects, with levels as listed below.
Here H dominates L. You wish to implement a Bell and LaPadula model of security for this system. Fill in the access rights (R and/or W) permitted by the model for each subject/object pair in the access matrix below:
Obj1
Obj2
Obj3
Subj1
Subj2
Subj3
Type
Name
Level
Object
Obj1
(H, {A})
Object
Obj2
(L, {B})
Object
Obj3
(L, {A,B})
Subject
Subj1
(L, {A,B})
Subject
Subj2
(H,{B})
Subject
Subj3
(H,{A,B,C})
Explanation / Answer
Obj1
Obj2
Obj3
Subj1
W
RW
RW
Subj2
R
RW
RW
Subj3
RW
RW
RW
Obj1
Obj2
Obj3
Subj1
W
RW
RW
Subj2
R
RW
RW
Subj3
RW
RW
RW
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