Table 3 The process of calculating the posterior probability of attack graph nodes

B₁

-

1

V₁

1/2(A_1;1 + A_2;1*A_4,1;2)

1/2(0.845*1+0.572) =0.7085

S₂

1/2(A_1;1A_2;1 + A_4,1;2)

1/2(0.845*1+0.572) =0.7085

V₃

A_1;1*A_2;1*A_3;2

0.845*1*0.284=0.23998

V_4,1

-

1

S₅

A_5;4,1

1*1=1

S₆

1/2* A_1;1 * A_2;1 * A_3;2 * A_6;3+ 

1/2* A_5;4,1 * A_7;5 * A_6;7

1/2*(0.845*1*0.284*1+0.238)

 =0.23899

V₇

A_5;4,1*A_7;5

1*0.238=0.238