# Unified Identity Architecture Design

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

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## 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.

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## 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)

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## 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.

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## 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

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## 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

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## 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

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## 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

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## 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

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## 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

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**Last Updated**: 2025-01-27