more than -2.00 for access to 1.0 security level
more than -2.50 for access to 0.9 security level
more than -3.00 for access to 0.8 security level
more than -3.50 for access to 0.7 security level
more than -4.00 for access to 0.6 security level
more than -4.50 for access to 0.5 security level