security-and-compliance

# Security and Compliance Builds the security baseline required for marketplace-scale SaaS operations. ## Coverage - Entra ID tenant strategy and service identity model. - Tenant identity mapping and trusted tenant-context propagation. - Authorization at every tenant-scoped resource and data access boundary. - Secret/certificate lifecycle management. - Data encryption, key ownership, and retention policy. - Cross-tenant access prevention and automated isolation testing. - Audit logging and compliance evidence mapping. Apply the security and isolation principles in [Architect multitenant solutions on Azure](https://learn.microsoft.com/en-us/azure/architecture/guide/multitenant/overview). Do not trust a tenant identifier supplied by a client without deriving or validating it against authenticated identity and authorization data. Explicitly test horizontal privilege escalation and cross-tenant data access in APIs, background jobs, caches, search indexes, logs, and administrative tooling. ## Deliverables - Security controls matrix by architecture component. - Tenant-context threat model and cross-tenant isolation test plan. - Compliance implementation checklist. - Risk register with remediation priorities.