With info this time:<br><br>A system state is defined to be "secure" if the only permitted access modes of subjects to objects are in accordance with a <a href="http://en.wikipedia.org/wiki/Security_policy" title="Security policy">security policy</a>.
To determine whether a specific access mode is allowed, the clearance
of a subject is compared to the classification of the object (more
precisely, to the combination of classification and set of
compartments, making up the <i>security level</i>) to determine if the
subject is authorized for the specific access mode. The
clearance/classification scheme is expressed in terms of a lattice. The
model defines two <a href="http://en.wikipedia.org/wiki/Mandatory_access_control" title="Mandatory access control">mandatory access control</a> (MAC) rules and one <a href="http://en.wikipedia.org/wiki/Discretionary_access_control" title="Discretionary access control">discretionary access control</a> (DAC) rule with three security properties:<br>
<br><br>Take care<br><br>Clement<br><br><br clear="all"><br>