foxhunt/docs/SECURITY.md

# Foxhunt Security Implementation

## 🔒 Overview

The Foxhunt HFT trading system implements enterprise-grade security measures designed to protect against threats while maintaining ultra-low latency performance. This document outlines the comprehensive security implementations and best practices.

## 🛡️ Security Architecture

### Defense in Depth

The security system implements multiple layers of protection:

1. **Network Security** - TLS 1.3, firewall rules, VPN access
2. **Authentication** - Multi-factor authentication, secure session management  
3. **Authorization** - Role-based access control with fine-grained permissions
4. **Input Validation** - Comprehensive sanitization and injection prevention
5. **Audit Logging** - Complete security event tracking and SIEM integration
6. **Encryption** - AES-256-GCM for data at rest and in transit
7. **Secrets Management** - HashiCorp Vault integration

### Security Components

```
┌─────────────────────────────────────────────────────────┐
│                    Web Application                        │
├─────────────────────────────────────────────────────────┤
│  Authentication Middleware │ Authorization Middleware    │
├─────────────────────────────────────────────────────────┤
│  Input Validation          │ Rate Limiting              │
├─────────────────────────────────────────────────────────┤
│  Audit Logger              │ SIEM Integration           │
├─────────────────────────────────────────────────────────┤
│  Encryption Manager        │ Secrets Manager            │
├─────────────────────────────────────────────────────────┤
│  HashiCorp Vault           │ Database Security          │
└─────────────────────────────────────────────────────────┘
```

## 🔐 Authentication & Authorization

### Authentication Methods

1. **JWT Token Authentication**
   - Secure JWT tokens with 1-hour expiration
   - Argon2 password hashing with salt
   - Session management with automatic timeout
   - Account lockout after 5 failed attempts

2. **API Key Authentication**
   - Prefixed API keys (`foxhunt_`) with SHA-256 hashing
   - Configurable expiration and rate limiting
   - IP address restrictions (optional)
   - Granular permission scoping

3. **Multi-Factor Authentication (Optional)**
   - TOTP-based (Google Authenticator compatible)
   - Backup codes for recovery
   - Required for admin accounts

### User Roles & Permissions

| Role | Permissions | Description |
|------|------------|-------------|
| **Admin** | All permissions | System administrators |
| **TradingManager** | Portfolio + Risk + View | Senior traders |
| **Trader** | Execute + Modify + Cancel orders | Active traders |
| **RiskManager** | Risk limits + Emergency stop | Risk oversight |
| **Analyst** | View positions + Historical data | Quantitative analysts |
| **ComplianceOfficer** | Audit logs + Compliance reports | Regulatory compliance |
| **Viewer** | Read-only access | Observers |
| **ApiUser** | API access only | Automated systems |
| **Auditor** | Audit logs + System config | External auditors |

### Permission Matrix

| Resource | Admin | TradingManager | Trader | RiskManager | Analyst | ComplianceOfficer | Viewer | ApiUser | Auditor |
|----------|-------|----------------|---------|------------|---------|-------------------|--------|---------|---------|
| Execute Trades | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ✅ | ❌ |
| Modify Orders | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ✅ | ❌ |
| Cancel Orders | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ✅ | ❌ |
| View Positions | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| Set Risk Limits | ✅ | ❌ | ❌ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ |
| Emergency Stop | ✅ | ✅ | ❌ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ |
| View Audit Logs | ✅ | ✅ | ❌ | ✅ | ❌ | ✅ | ❌ | ❌ | ✅ |
| System Admin | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ |

## 🔒 Input Validation & Security

### Validation Rules

The system implements comprehensive input validation:

1. **Symbol Validation**
   - Pattern: `^[A-Z0-9._-]+$`
   - Length: 1-20 characters
   - No SQL injection patterns

2. **Order Validation**
   - Quantity: 1-1,000,000,000 (no zero or negative)
   - Price: 0.01-1,000,000.00 (for limit orders)
   - Finite numbers only (no NaN/Infinity)

3. **User Input Validation**
   - Email: RFC 5322 compliant format
   - Username: Alphanumeric with limited special chars
   - Password: Minimum 12 chars, complexity requirements

4. **Injection Prevention**
   - SQL injection pattern detection
   - XSS payload detection
   - Command injection prevention
   - NoSQL injection protection

### Security Patterns Detected

The system automatically detects and blocks:

```regex
# SQL Injection
(?i)(union|select|insert|update|delete|drop|exec|execute)
('|\"|;|--|\|\/\*|\*\/)

# XSS
(\<|\>|&lt;|&gt;|&amp;)
(?i)(script|javascript|vbscript|onload|onerror)

# Command Injection  
(;|\||&|`|\$\()
```

## 📝 Audit Logging & Monitoring

### Audit Events

All security-relevant events are logged:

- **Authentication Events**: Login success/failure, token issued/expired
- **Authorization Events**: Permission granted/denied, role changes
- **Trading Events**: Order placed/cancelled, trades executed
- **Administrative Events**: Configuration changes, user management
- **Security Events**: Suspicious activity, security breaches

### Log Format

```json
{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "timestamp": "2023-12-07T10:30:00Z",
  "event_type": "LoginSuccess", 
  "user_id": "123e4567-e89b-12d3-a456-426614174000",
  "username": "trader@foxhunt.com",
  "ip_address": "192.168.1.100",
  "user_agent": "Mozilla/5.0...",
  "resource": "orders",
  "action": "create",
  "result": "success",
  "metadata": {
    "session_id": "session-123",
    "order_id": "order-456"
  },
  "severity": "info"
}
```

### SIEM Integration

- **Splunk** integration for enterprise monitoring
- **Elasticsearch** support for log analysis
- **Real-time alerting** for security incidents
- **Threat intelligence** integration

## 🔐 Encryption & Secrets Management

### Encryption Standards

1. **Data at Rest**
   - AES-256-GCM encryption
   - Key rotation every 90 days
   - Hardware Security Module (HSM) support

2. **Data in Transit**
   - TLS 1.3 minimum version
   - Perfect Forward Secrecy
   - Certificate pinning

3. **Application Secrets**
   - HashiCorp Vault integration
   - Automatic secret rotation
   - Encrypted environment variables

### Secrets Management

```bash
# Vault Integration Example
vault write secret/foxhunt/prod/db \
  username="prod_user" \
  password="secure_password"

vault write secret/foxhunt/prod/api \
  polygon_key="your_key" \
  jwt_secret="your_jwt_secret"
```

## ⚡ Performance Considerations

### Low-Latency Security

Security implementations are optimized for HFT requirements:

- **Authentication**: < 100μs token validation
- **Authorization**: < 50μs permission checks  
- **Input Validation**: < 10μs for order validation
- **Audit Logging**: Asynchronous, non-blocking
- **Encryption**: Hardware-accelerated when available

### Caching Strategy

- **JWT Claims**: Cached for session duration
- **User Permissions**: 5-minute cache TTL
- **Rate Limits**: In-memory sliding window
- **Audit Events**: Batched writes every 1 second

## 🚨 Incident Response

### Security Incidents

1. **Detection**: SIEM alerts, anomaly detection
2. **Analysis**: Log correlation, threat hunting
3. **Containment**: Account lockout, service isolation
4. **Eradication**: Malware removal, vulnerability patching
5. **Recovery**: Service restoration, monitoring
6. **Lessons Learned**: Process improvement, training

### Emergency Procedures

- **Emergency Stop**: Halt all trading activities
- **Account Lockout**: Disable compromised accounts
- **Service Isolation**: Network segmentation
- **Incident Communication**: Stakeholder notification

## 🔧 Configuration

### Environment Variables

Critical security configuration (see `.env.example`):

```bash
# JWT Configuration
FOXHUNT_JWT_SECRET=your-64-character-secret
FOXHUNT_SESSION_TIMEOUT_MINUTES=480

# Authentication
FOXHUNT_MAX_FAILED_ATTEMPTS=5
FOXHUNT_LOCKOUT_DURATION_MINUTES=15
FOXHUNT_PASSWORD_MIN_LENGTH=12

# Encryption
FOXHUNT_ENCRYPTION_ALGORITHM=AES-256-GCM
FOXHUNT_TLS_VERSION=1.3

# Vault
FOXHUNT_VAULT_URL=https://vault.example.com
FOXHUNT_VAULT_TOKEN=hvs.your-token-here
```

### Production Checklist

- [ ] Generate strong JWT secret (64+ characters)
- [ ] Configure HashiCorp Vault for secrets
- [ ] Enable TLS 1.3 with valid certificates
- [ ] Set up SIEM integration (Splunk/ELK)
- [ ] Configure firewall rules and VPN access
- [ ] Enable MFA for all admin accounts
- [ ] Set appropriate session timeouts
- [ ] Configure audit log retention (90+ days)
- [ ] Set up automated security scanning
- [ ] Configure backup and disaster recovery

## 🧪 Security Testing

### Test Coverage

The security test suite includes:

1. **Authentication Tests**
   - Valid/invalid credentials
   - Token validation and expiration
   - Account lockout scenarios
   - Concurrent authentication

2. **Authorization Tests**
   - Role-based access control
   - Permission boundary testing
   - Privilege escalation prevention

3. **Input Validation Tests**
   - SQL injection attempts
   - XSS payloads
   - Command injection
   - Buffer overflow attempts
   - Malformed JSON payloads

4. **Security Integration Tests**
   - End-to-end authentication flows
   - Audit log verification
   - Rate limiting enforcement
   - Session management

### Running Security Tests

```bash
# Run comprehensive security test suite
cargo test security_integration_tests

# Run specific security tests
cargo test test_authentication_integration
cargo test test_input_validation_comprehensive
cargo test test_authorization_roles

# Run security benchmarks
cargo bench security_benchmarks
```

## 🔍 Vulnerability Management

### Security Scanning

Regular security assessments include:

- **SAST**: Static Application Security Testing
- **DAST**: Dynamic Application Security Testing
- **Dependency Scanning**: Known vulnerability detection
- **Container Scanning**: Docker image vulnerabilities
- **Infrastructure Scanning**: Cloud security posture

### Penetration Testing

Annual penetration testing covers:

- **External Attack Surface**: Internet-facing services
- **Internal Networks**: Lateral movement scenarios
- **Application Security**: Business logic flaws
- **Social Engineering**: Phishing simulations
- **Physical Security**: Data center access

## 📋 Compliance

### Regulatory Compliance

The security implementation supports:

- **SOX**: Audit trails and access controls
- **PCI DSS**: Secure payment card handling
- **GDPR**: Privacy by design and data protection
- **FINRA**: Financial services requirements
- **MiFID II**: European markets compliance
- **SOC 2 Type II**: Security and availability controls

### Security Certifications

Target certifications:
- ISO 27001 (Information Security Management)
- SOC 2 Type II (Security and Availability)
- PCI DSS Level 1 (Payment Card Security)

## 🆘 Security Contacts

### Security Team

- **Security Officer**: security@foxhunt.com
- **Incident Response**: incident@foxhunt.com
- **Vulnerability Reports**: security-reports@foxhunt.com

### Emergency Contacts

- **24/7 Security Hotline**: +1-555-SEC-HELP (555-732-4357)
- **Incident Response Team**: incident-team@foxhunt.com

## 📚 Additional Resources

### Documentation

- [Authentication API Reference](./docs/api/authentication.md)
- [Authorization Guide](./docs/guides/authorization.md)
- [Deployment Security](./docs/deployment/security.md)
- [Incident Response Playbook](./docs/security/incident-response.md)

### Security Training

- Security awareness training for all staff
- Secure coding practices for developers
- Incident response training for operations
- Regular security updates and briefings

---

**Last Updated**: December 2024  
**Version**: 1.0  
**Classification**: Internal Use Only