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Unified Identity Architecture Design

Date: 2025-01-27 Purpose: Design document for unified identity system Status: Design Document

Executive Summary

This document outlines the design for a unified identity system that provides single sign-on (SSO) and centralized user management across all workspace projects.

Architecture Overview

Components

  1. Identity Provider (Keycloak, Auth0, or Entra ID)
  2. Authentication Service (Custom or provider)
  3. User Management Service (Centralized)
  4. Authorization Service (RBAC/ABAC)
  5. Session Management (JWT tokens, refresh tokens)

Technology Options

Option 1: Keycloak (Recommended - Self-Hosted)

Pros:

  • Open-source and free
  • Feature-rich
  • Standards-compliant (OAuth2, OIDC, SAML)
  • Self-hosted control

Cons:

  • Requires infrastructure
  • More setup complexity

Option 2: Auth0

Pros:

  • Managed service
  • Easy setup
  • Good documentation
  • Enterprise features

Cons:

  • Commercial (paid)
  • Vendor lock-in

Option 3: Microsoft Entra ID

Pros:

  • Enterprise integration
  • Azure ecosystem
  • Good security features

Cons:

  • Azure dependency
  • Commercial (paid)

Recommendation: Keycloak for self-hosted, Auth0 for managed.

Features

Authentication

  • Single Sign-On (SSO)
  • Multi-factor authentication (MFA)
  • Social login (Google, GitHub, etc.)
  • Passwordless authentication

Authorization

  • Role-Based Access Control (RBAC)
  • Attribute-Based Access Control (ABAC)
  • Fine-grained permissions
  • Resource-level access control

User Management

  • Centralized user directory
  • User provisioning
  • Profile management
  • Account lifecycle

Implementation Plan

Phase 1: Identity Provider Setup (Weeks 1-2)

  • Deploy Keycloak or configure Auth0
  • Set up realms/clients
  • Configure authentication flows
  • Set up MFA

Phase 2: User Management (Weeks 3-4)

  • Create user management service
  • Implement user provisioning
  • Set up user directory
  • Configure user sync

Phase 3: SSO Implementation (Weeks 5-6)

  • Implement SSO in projects
  • Configure OAuth2/OIDC
  • Test SSO flow
  • Migrate existing users

Phase 4: Authorization (Weeks 7-8)

  • Implement RBAC
  • Configure permissions
  • Set up policy engine
  • Test authorization

Integration Points

Projects Integration

  • dbis_core: Banking system authentication
  • the_order: Identity platform integration
  • Sankofa: Platform user management
  • Web apps: Frontend authentication

API Integration

  • API Gateway: Authentication middleware
  • Microservices: JWT validation
  • GraphQL: Authentication resolvers

Security Considerations

Authentication Security

  • Strong password policies
  • MFA enforcement
  • Session management
  • Token security

Authorization Security

  • Principle of least privilege
  • Regular access reviews
  • Audit logging
  • Permission validation

Migration Strategy

User Migration

  1. Export users from existing systems
  2. Import to unified system
  3. Map existing roles/permissions
  4. Test authentication
  5. Cutover users

Application Migration

  1. Add SSO support
  2. Test authentication flow
  3. Migrate users gradually
  4. Deprecate old auth
  5. Complete migration

Monitoring

Metrics

  • Authentication success/failure rates
  • SSO usage
  • Token refresh rates
  • Permission check performance

Alerts

  • High authentication failures
  • SSO failures
  • Token expiration issues
  • Permission errors

Last Updated: 2025-01-27

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