# Authentication & Authorization

## Overview
The Authentication & Authorization service will provide comprehensive security controls for the stock-bot platform. It will manage user identity, authentication, access control, and security policy enforcement across all platform components, ensuring proper security governance and compliance with regulatory requirements.

## Planned Features

### User Management
- **User Provisioning**: Account creation and management
- **Identity Sources**: Local and external identity providers
- **User Profiles**: Customizable user attributes
- **Group Management**: User grouping and organization
- **Account Lifecycle**: Comprehensive user lifecycle management

### Authentication
- **Multiple Factors**: Support for MFA/2FA
- **Single Sign-On**: Integration with enterprise SSO solutions
- **Social Login**: Support for third-party identity providers
- **Session Management**: Secure session handling and expiration
- **Password Policies**: Configurable password requirements

### Authorization
- **Role-Based Access Control**: Fine-grained permission management
- **Attribute-Based Access**: Context-aware access decisions
- **Permission Management**: Centralized permission administration
- **Dynamic Policies**: Rule-based access policies
- **Delegated Administration**: Hierarchical permission management

### Security Features
- **Token Management**: JWT and OAuth token handling
- **API Security**: Protection of API endpoints
- **Rate Limiting**: Prevention of brute force attacks
- **Audit Logging**: Comprehensive security event logging
- **Compliance Reporting**: Reports for regulatory requirements

## Planned Integration Points

### Service Integration
- All platform microservices
- API Gateway
- Frontend applications
- External systems and partners

### Identity Providers
- Internal identity store
- Enterprise directory services
- Social identity providers
- OAuth/OIDC providers

## Planned Technical Implementation

### Technology Stack
- **Identity Server**: Keycloak or Auth0
- **API Protection**: OAuth 2.0 and OpenID Connect
- **Token Format**: JWT with appropriate claims
- **Storage**: Secure credential and policy storage
- **Encryption**: Industry-standard encryption for sensitive data

### Architecture Pattern
- Identity as a service
- Policy-based access control
- Token-based authentication
- Layered security model

## Development Guidelines

### Authentication Integration
- Authentication flow implementation
- Token handling best practices
- Session management requirements
- Credential security standards

### Authorization Implementation
- Permission modeling approach
- Policy definition format
- Access decision points
- Contextual authorization techniques

### Security Considerations
- Token security requirements
- Key rotation procedures
- Security event monitoring
- Penetration testing requirements

## Implementation Roadmap
1. Core user management and authentication
2. Basic role-based authorization
3. API security and token management
4. Advanced access control policies
5. Compliance reporting and auditing