Why User authentication and authorization in SCADA systems? - Purpose & Use Cases

The Big Idea

What if one wrong person could accidentally shut down your entire plant?

The Scenario

Imagine a SCADA system where every operator manually checks user IDs and passwords on paper before allowing access to control critical machines.

The Problem

This manual checking is slow, prone to mistakes, and can let unauthorized users slip in, risking safety and costly downtime.

The Solution

User authentication and authorization automate verifying who you are and what you can do, keeping the system safe and running smoothly without delays.

Before vs After

✗ Before

Check user ID on paper
Ask supervisor for approval
Allow or deny access

✓ After

Authenticate user with password
Check user role permissions
Grant or deny access automatically

What It Enables

It enables secure, fast, and reliable control over who can operate or change critical SCADA system functions.

Real Life Example

In a power plant, only authorized engineers can adjust turbine settings, preventing accidents and ensuring smooth energy production.

Key Takeaways

Manual user checks are slow and risky.

Authentication confirms identity automatically.

Authorization controls what each user can do safely.