Threat models and boundaries
Make trust, data, identity, and failure boundaries explicit before implementation choices harden.
Solutions / Security engineering
Security engineering.
Build access control, data protection, audit evidence, and recoverable operations into the system from the first architecture decision.
Operating journey
Make security visible from design to production.
Security becomes an operating property when boundaries, permissions, evidence, detection, and recovery remain connected through the full lifecycle.
Security decisions arrive after product and integration boundaries are already fixed.
Access rules differ across applications, infrastructure, and operational workflows.
Teams cannot produce reliable evidence of who changed what and why.
Incident response depends on knowledge that is not captured in the operating system.
Threat model
Identify assets, actors, trust boundaries, abuse cases, and required controls before the architecture closes.
What Chisu builds
One operating system, delivered in clear parts.
Identity and access control
Enforce least privilege across users, services, environments, and sensitive operations.
Security evidence
Capture audit trails, approvals, tests, and deployment evidence as part of normal delivery.
Detection and recovery
Instrument critical paths and define how the team contains, recovers, and learns from incidents.