IEC 62443 security level calculator
Which target security level (SL-T) does your zone need? A reasoned suggestion in a few steps. Free, no sign-up, your answers are not stored.
Answer the questions for one zone or conduit. The binding SL-T comes from the risk assessment under IEC 62443-3-2; the calculator gives you a reasoned starting point for it.
Frequently asked questions about the security level calculator
What is a security level?
In IEC 62443, a security level describes the kind of attacker a zone, conduit, system or component protects against, from SL 1 (mistakes) to SL 4 (attackers with extensive resources).
Does the calculator replace the risk assessment?
No. The asset owner sets the SL-T in the risk assessment under IEC 62443-3-2, with threats, impact and tolerable risk per zone. The calculator gives you a reasoned starting point for it.
What is the difference between SL-T, SL-C and SL-A?
SL-T is the target for a zone, SL-C what a system or component can deliver when properly configured, and SL-A what has actually been achieved in the plant.
Why does the calculator ask for four attacker characteristics?
The levels differ by means, resources, skills and motivation. The calculator takes the level that at least two characteristics point to, so a single outlier does not decide the result.
Mes données sont-elles enregistrées ?
Non. L’évaluation s’effectue uniquement en mémoire vive et n’est ni enregistrée ni journalisée.
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