chess-vector-engine 0.5.1

# Security Policy

## 🔒 Supported Versions

We actively maintain and provide security updates for the following versions of Chess Vector Engine:

| Version | Supported          | End of Life |
| ------- | ------------------ | ----------- |
| 0.1.x   | ✅ Yes             | TBD         |
| < 0.1   | ❌ No              | -           |

## 🚨 Reporting a Vulnerability

**Please do not report security vulnerabilities through public GitHub issues.**

### For Security Issues

If you discover a security vulnerability, please send an email to:

**security@chessvector.ai**

Include the following information in your report:

1. **Description** - A clear description of the vulnerability
2. **Impact** - Potential impact and attack scenarios
3. **Reproduction** - Step-by-step instructions to reproduce the issue
4. **Environment** - Version, operating system, and relevant configuration
5. **Proof of Concept** - If available, include code or screenshots

### What to Expect

- **Acknowledgment** - We'll acknowledge receipt within 24 hours
- **Initial Assessment** - We'll provide an initial assessment within 72 hours
- **Updates** - We'll keep you informed of our progress throughout the process
- **Resolution** - We aim to resolve critical issues within 7 days

### Responsible Disclosure

We follow responsible disclosure practices:

1. **Investigation** - We'll investigate and validate the report
2. **Fix Development** - We'll develop and test a fix
3. **Coordinated Release** - We'll coordinate release timing with you
4. **Public Disclosure** - We'll publicly disclose after the fix is available
5. **Credit** - We'll credit you in our security advisory (if desired)

## 🛡️ Security Considerations

### Open-Core Architecture

Chess Vector Engine uses an open-core business model with different security considerations for each tier:

#### 🆓 Open Source Components
- **Code Transparency** - All open source code is publicly auditable
- **Community Review** - Security issues can be reported by anyone
- **Standard Protections** - Standard Rust memory safety guarantees

#### 💎 Premium Components
- **License Verification** - Robust license validation system
- **Feature Gating** - Runtime protection against unauthorized feature access
- **Network Security** - Secure license server communication

#### 🏢 Enterprise Components
- **Enhanced Security** - Additional security measures for enterprise environments
- **Audit Trails** - Comprehensive logging and monitoring
- **Compliance** - Meets enterprise security standards

### Common Security Areas

#### Memory Safety
- **Rust Language** - Inherent memory safety protections
- **Unsafe Code** - Limited and carefully reviewed unsafe blocks
- **Dependencies** - Regular security audits of dependencies

#### Input Validation
- **FEN Parsing** - Robust validation of chess position strings
- **UCI Protocol** - Proper validation of UCI commands
- **Training Data** - Validation of external training data formats

#### Network Security
- **TLS Encryption** - All network communications use TLS
- **Certificate Validation** - Proper certificate validation
- **Rate Limiting** - Protection against abuse

#### License System Security
- **Key Validation** - Cryptographic validation of license keys
- **Offline Verification** - Secure offline license verification
- **Tamper Protection** - Protection against license tampering

## 🔧 Security Best Practices

### For Users

#### Installation Security
```bash
# Verify package integrity
cargo install chess-vector-engine --locked

# Or build from source
git clone https://github.com/chessvector/chess-vector-engine
cd chess-vector-engine
git verify-commit HEAD  # If using signed commits
cargo build --release
```

#### Runtime Security
- **Principle of Least Privilege** - Run with minimal required permissions
- **Isolated Environment** - Consider containerization for production use
- **Input Validation** - Validate all external inputs (FEN strings, PGN files)
- **Resource Limits** - Set appropriate memory and CPU limits

#### License Security
- **Secure Storage** - Store license keys securely
- **Network Security** - Use secure networks for license verification
- **Key Rotation** - Regularly rotate license keys if supported

### For Developers

#### Code Security
```rust
// Always validate external inputs
fn parse_fen(fen: &str) -> Result<Board, ChessError> {
    // Comprehensive FEN validation
    if fen.len() > MAX_FEN_LENGTH {
        return Err(ChessError::InvalidFen("FEN too long".to_string()));
    }
    // ... additional validation
}

// Use secure random number generation
use rand::thread_rng;
let mut rng = thread_rng();
```

#### Dependency Security
```bash
# Regular security audits
cargo audit

# Update dependencies regularly
cargo update

# Check for known vulnerabilities
cargo deny check
```

## 🚨 Known Security Considerations

### Current Limitations

1. **Training Data Trust** - The engine trusts training data integrity
   - **Mitigation**: Validate training data sources
   - **Future**: Implement training data signing

2. **Network Dependency** - License verification requires network access
   - **Mitigation**: Offline verification available
   - **Future**: Enhanced offline capabilities

3. **Resource Consumption** - Large datasets can consume significant resources
   - **Mitigation**: Implement resource limits
   - **Future**: Better resource management

### Attack Vectors

#### Malicious Training Data
- **Risk**: Crafted training data could affect engine behavior
- **Mitigation**: Validate training data sources and formats
- **Detection**: Monitor for unusual engine behavior

#### Resource Exhaustion
- **Risk**: Large inputs could cause memory or CPU exhaustion
- **Mitigation**: Implement input size limits and timeouts
- **Detection**: Monitor resource usage patterns

#### License Bypass Attempts
- **Risk**: Attempts to bypass license verification
- **Mitigation**: Robust license validation and tamper detection
- **Detection**: Monitor for license validation failures

## 📋 Security Checklist

### For Production Deployment

- [ ] **Environment Security**
  - [ ] Run in isolated environment (container/VM)
  - [ ] Apply principle of least privilege
  - [ ] Configure appropriate resource limits
  - [ ] Enable logging and monitoring

- [ ] **Network Security**
  - [ ] Use TLS for all network communications
  - [ ] Validate certificates properly
  - [ ] Implement rate limiting
  - [ ] Use firewall rules to restrict access

- [ ] **Input Validation**
  - [ ] Validate all external inputs (FEN, PGN, training data)
  - [ ] Implement input size limits
  - [ ] Sanitize file paths
  - [ ] Validate license keys

- [ ] **Monitoring and Logging**
  - [ ] Enable comprehensive logging
  - [ ] Monitor for security events
  - [ ] Set up alerting for anomalies
  - [ ] Regular security audits

## 🏆 Security Hall of Fame

We appreciate security researchers who help keep Chess Vector Engine secure:

<!-- This section will be updated as we receive and address security reports -->

*No security issues have been reported yet.*

## 📞 Contact Information

- **Security Email**: security@chessvector.ai
- **General Contact**: hello@chessvector.ai
- **Website**: https://chessvector.ai

## 📝 Security Policy Updates

This security policy is regularly reviewed and updated. Last updated: 2024-12-22

For the most current version of this policy, please check: 
https://github.com/chessvector/chess-vector-engine/blob/main/SECURITY.md