Too many teams still treat cybersecurity like a developer problem:
cleaner code, faster patching, more scanning, harder reviews.
All important.
Still not enough.

I keep seeing the same pattern:

a polished product ships, the code is clean, the scans pass, the developers did their job…
Then a fraudster finds the gap that was never in the code.
A payment step that can be skipped.
An onboarding flow that can be replayed.
A tenant boundary that looks isolated but is not.
A recovery flow that trusts the wrong signal.
A workflow that can be abused with valid credentials, bots, or repeated sessions.

That is not a coding bug.

That is Insecure Design.

And that is why even strong engineering teams can still lose to weak security architecture.

The key point:

OWASP Insecure Design is not only a secure coding issue.
It is also a fraud prevention, identity trust, and business logic resilience issue.

What helps?

Start earlier:
threat modeling, secure design patterns, tenant segregation, misuse case testing, and security thinking before release, not after the incident.

Then accept the uncomfortable truth:

even good design ages.
Fraud rings adapt.
Bot operators learn your workflows.
Attackers behave more like legitimate users.

That is where CrossClassify adds value.

CrossClassify helps detect runtime symptoms of insecure design through:

• Device fingerprinting for suspicious devices, spoofing, repeat offenders, and multi-account abuse

• Behavioral biometrics for continuous authentication, abnormal session detection, and workflow manipulation signals

Because for A06, prevention matters.
But prevention alone is not enough.
You also need continuous monitoring that tells you when real-world behavior no longer matches your design assumptions.
That is how you move from insecure design to resilient application security.