You may specify a different dependency degree for each dimension of security. To do so, on the panel to edit asset dependencies, click the right button to jump into a new window where you may establish a precise dependency degree for each dimension.


Typical values are as follow:


N

none

0%

no dependency

L

low

1%

academic – barely meaningful

M

medium

10%

meaningful, though not very much

H

high

50%

I do not know ...

VH

very high

90%

nearly complete

T

total

100%

full dependency


Click the right mouse button on the dependency you wish to modify:

  • set all        the same percentage is applied to every dimension
  • set only        100% for the selected dimension, 0% for the others
  • set        100% for the selected dimension, leave the other unmodified
  • unset        0% for the selected dimension, leave the other unmodified
  • details        open the editing window



When you leave the editing window, the dependency degree appears on the dependencies tree using a compact notation. Let's show a few examples:

expression

meaning

A:100%

the dependency is only for the availability dimension; 
the other dimensions are not connected

e.g. when a VPN stops the need to protect confidentiality any longer

I:100% / C:100%

the dependency is only for the integrity and confidentiality dimensions;
the other dimensions are not connected

e.g. when a redundant equipment guarantees availability


The format may be described as

expression ::= { one_dimension }0+

one_dimension ::= ACRONYM ':' percent '/'


When an expression is presented, all dimensions have a 0% dependency degree, except those explicitly stated.