Decidi for security engineers

Think like the attacker before the attacker does.

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Have the threat model, the assumptions and the blast radius examined by independent models — so the control you ship has already been argued against by an adversary.

Why security engineers use it

Run a red-team pass: how does a determined attacker actually get in, and what do they reach?
Pressure-test the threat model for the attack path you assumed away.
Surface the assumption your control quietly depends on — and what happens when it’s false.
Stress-test the blast radius and the detection gap before an incident proves it for you.
Have independent models cross-check the analysis so one confident "that’s fine" doesn’t go unchallenged.
Get a skeptic to argue the control is bypassable, then see if you can defend it.

Stress-test before you ship

The threat model — the path you assumed away
Attacker’s point of view — entry, movement, reach
Assumptions the control depends on
Blast radius and detection gaps
The bypass — can the control be defeated?
Incident response — the 2am scenario

Your council

Red Teamer🔐Security Engineer 😈Devil’s Advocate ⚖️Risk Officer 🛰️Reliability Engineer

Adversarial passes we run

Red-team passThreat-model critiqueAssumption-busting sweepBlast-radius & detection auditBypass-attempt review

A worked example — the architecture review before pen-test budget

Say a new partner-facing API ships next month, the pen test is booked for the week before launch, and you already suspect the findings will arrive too late to fix anything structural. What you need now is the attack map — while the design can still change.

The Red Teamer walks the attack paths a motivated outsider would try — token scope abuse, the trust boundary between partner and end-user identity, the endpoints that leak more in their errors than their responses — while the Security Engineer maps the design against the boring controls that actually stop breaches: scoping, rate limits, audit trails. The Reliability Engineer covers detection: which of these attacks would you even see in current logging? The Risk Officer forces the ranking by likelihood-times-impact so the fix list survives contact with the sprint, and the Devil’s Advocate hunts the “secure” assumption everyone stopped questioning. The pen test then confirms a hardened design instead of discovering a soft one.

Ready-made briefs that fit

Security Threat Model

Red-team a system to find how an attacker would actually break it.

Code Architecture Review

Pressure-test a system design before you commit to it.

Incident Post-Mortem

Run a blameless post-mortem that finds the real systemic cause.

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