Security Architecture

Executive Summary

Security Architecture defines the cross-cutting security controls for Algosure. It covers Zero Trust, secure APIs, authentication, authorization, tenant isolation, data protection, audit, secrets, secure AIOS access, secure integrations, and approval controls for high-impact actions.

Why This Exists

Algosure handles procurement, compliance, tenders, documents, bids, contracts, funding, billing, analytics, integrations, and AI-assisted decisions for multiple customer organizations. Security must be designed into every boundary rather than added after implementation.

Owner

The owner is the Chief Product Officer and Enterprise Architect.

Business Value

Security architecture protects customer trust, tenant isolation, commercial confidentiality, compliance readiness, AI governance, and operational continuity.

Security Control Model

flowchart TB
    Request[User, AIOS, or Integration Request]
    Authn[Authentication]
    Context[Tenant, Organization, User Context]
    Authz[Authorization]
    Entitlement[Entitlement Check]
    Approval[Approval Controls]
    API[Secure API Boundary]
    Domain[Owning Domain]
    Data[Protected Data and Documents]
    Audit[Audit Logging]

    Request --> Authn
    Authn --> Context
    Context --> Authz
    Authz --> Entitlement
    Entitlement --> Approval
    Approval --> API
    API --> Domain
    Domain --> Data
    Domain --> Audit

Source Ownership Rules

Area	Source Owner
Identity and authorization decisions	Identity Domain.
Organization facts and organization membership context	Organization Domain.
Entitlement facts, plans, limits, and subscription access	Billing Domain.
Platform policies and security configuration	Administration Domain.
Business facts and domain-specific access rules	Owning Domain.
Cross-cutting controls, review criteria, and security architecture	Security Architecture.

Keycloak Position

Keycloak is the official Identity Provider for Algosure authentication, SSO, realms, clients, roles, groups, token issuing, MFA, and federation.

Keycloak remains an implementation platform. The Algosure Identity Domain remains the business and domain model for users, organization membership, permissions, tenant access, authorization decisions, and audit context.

Keycloak Architecture Scope

Keycloak Capability	Architecture Role
Realm strategy	Provides the official authentication security boundary for Algosure environments and approved tenant federation patterns.
Clients	Represents approved mobile app, web app, backend, and internal service access patterns.
JWT access tokens	Carries authenticated subject, expiry, issuer, audience, roles, groups, and mapped context needed by API security.
Refresh tokens	Supports session continuity for approved clients under rotation, expiry, revocation, and risk controls.
Role mapping	Supplies platform role signals that the Identity Domain interprets into Algosure authorization context.
Group mapping	Supplies organization, team, or enterprise identity grouping signals where approved.
MFA	Enforces multi-factor requirements for privileged, administrative, high-impact, or policy-sensitive access.
Service accounts	Supports machine-to-machine authentication for backend and internal services under least privilege.
Federation and future SSO	Supports future enterprise SSO and social login through governed identity federation.

Domain Boundary With Keycloak

Concern	Official Owner
Authentication protocol, token issuing, MFA, federation, SSO	Keycloak platform.
User business identity, organization membership, permissions, tenant access, authorization decisions, audit context	Identity Domain.
Organization profile, organization facts, customer operating context	Organization Domain.
Entitlements, plans, feature limits, subscription access	Billing Domain.
Final API access decision	Identity Domain plus Organization, Billing, Administration, and owning Domain rules.

Security Principles

Principle	Meaning
Zero Trust	Every request is authenticated, authorized, tenant-scoped, policy-checked, and auditable.
Least privilege	Users, AIOS, services, integrations, and operators receive only the access needed for approved work.
Secure by design	Security controls are part of architecture, APIs, data, AIOS, integrations, and workflows from the start.
Multi-tenant by design	Tenant context and organization context are mandatory at every customer-data boundary.
Defense in depth	Authentication, authorization, tenant filtering, encryption, audit, rate limiting, and approval controls layer together.
Fail closed	Missing context, ambiguous authorization, entitlement failure, or policy failure denies access.
Human approval for high-impact actions	Sensitive AI, payment, funding, submission, compliance, and external commitment actions require approval where policy requires it.

Non-Implementation Boundary

This document does not define Keycloak realm configuration, token schemas, code, policy engine rules, database schemas, network topology, or cloud security products.