Platform · Secure by Design · Security Design Review
Every review runs the same governed path: intake, business impact, an architecture diagram, the design explanation, a threat model with mapped controls, and named sign-offs. The AI studios draft the artefacts in minutes; your reviewers spend their time on the decisions.
The definition
A security design review is a structured evaluation of a system's design, before or while it is built: does the architecture meet its security objectives, are authentication and authorization flows sound, where do trust boundaries sit, how does sensitive data move, what happens when components fail, and which regulatory obligations shape the design.
It is not a penetration test and not a code review; those examine what was built. A design review catches the flaws that exist before any code does, where a fix is a conversation instead of a re-platforming project. That is also why it is the hardest security practice to sustain: it depends on artefacts (diagrams, explanations, threat models) that engineering teams rarely have time to produce.
Alvor makes the review a workflow instead of a favor. Intake and business impact set the depth, the agentic studios draft the artefacts with the team, the threat model produces required build controls, and named approvers sign the result into a baseline. Every review, the same governed path, on the record.
The review workflow
The project declares itself: type, scope, and what kind of review it needs. No more reviews requested over Slack.
Impact scoring tiers the system, so a payments platform and an internal wiki do not get the same depth of review.
The diagram is drawn on the live canvas, by hand or by the Design with AI studio from a description or whiteboard photo.
Write with AI interviews the engineers and writes the design explanation: purpose, data flows, decisions, assumptions.
Model with AI proposes STRIDE threats anchored to the diagram and maps controls from your catalog; approved mappings become required build controls.
Architecture decision records and a named approver matrix close the review; the design baselines, and later changes are governed. One click exports the whole record as a PDF.
Sign-off matrix
Architecture
A. Rahman
Security
J. Chen
Data governance
L. Novak
Baseline locks on final approval. Changes after baseline are governed decisions, not silent edits.
Scanners find bugs in code that exists. Design reviews stop the architecture from being the bug.
Service-to-service calls that skip the identity provider, tokens with no expiry, machine credentials with human privileges: invisible to a scanner until they ship.
Internal traffic treated as trusted, a management plane reachable from the product network, one subnet doing three jobs.
Multi-tenant data separated by a WHERE clause and good intentions. The cheapest moment to catch it is on the diagram.
PII crossing a boundary unencrypted, exports landing in a bucket nobody classified, retention nobody designed.
A Tier 1 system with a single point of failure, or recovery assumptions the business impact analysis contradicts.
Data residency, auditability, and separation-of-duties obligations that cost a sprint at design time and a quarter after launch.
Why reviews die, and the fix
A security team of three cannot hand-draw diagrams for a roadmap of forty projects, so reviews get skipped, and the skipped ones ship the incidents. The studios remove the friction: artefacts arrive in minutes, drafted with the team that owns the system, and every AI write pauses on an audit-logged approval card. Reviewers review; nothing reviews itself.
Where it fits
Comparing dedicated design-review and threat modeling tools? See how Alvor stacks up against IriusRisk, ThreatModeler, and SD Elements.
Questions
A security design review is a structured evaluation of a system's design before (or while) it is built: does the architecture meet its security objectives, are authentication and authorization flows sound, where do trust boundaries sit, how does sensitive data move, what happens when components fail, and which compliance obligations shape the design. It is distinct from a penetration test or code review, which examine what was built; a design review catches the class of flaws that exist before any code does, where they are cheapest to fix.
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