## SECURITY.md

```markdown
# Security Policy

## Supported Versions

| Version | Supported          |
| ------- | ------------------ |
| 1.0.x   | :white_check_mark: |
| 0.9.x   | :white_check_mark: |
| 0.5.x   | :x:                |
| < 0.5   | :x:                |

## Reporting a Vulnerability

We take security seriously. If you discover a security vulnerability, please report it responsibly.

### How to Report

1. **Do NOT open a public issue**
2. Email security@automotive-rtos.com
3. Include detailed information
4. Allow time for response

### What to Include

- Description of vulnerability
- Steps to reproduce
- Impact assessment
- Suggested fix (if any)
- Your contact information

### Response Process

1. **Acknowledgment** (within 24 hours)
   - Confirm receipt
   - Assign tracking number

2. **Assessment** (within 72 hours)
   - Verify vulnerability
   - Determine severity
   - Identify affected versions

3. **Fix Development**
   - Develop fix
   - Test thoroughly
   - Prepare release

4. **Disclosure**
   - Coordinate disclosure
   - Release fix
   - Publish advisory

## Security Measures

### Current Security Features

- **Memory Protection**
  - MPU support
  - Stack overflow detection
  - Heap protection

- **Communication Security**
  - E2E protection
  - CRC validation
  - Message authentication

- **Access Control**
  - Task isolation
  - Privilege levels
  - Resource protection

- **Fault Handling**
  - Fault detection
  - Safe state management
  - Error recovery

### Security Best Practices

1. **Configuration**
   - Enable all security features
   - Use secure defaults
   - Regular security updates

2. **Development**
   - Follow secure coding guidelines
   - Regular security audits
   - Threat modeling

3. **Deployment**
   - Secure boot
   - Firmware signing
   - Secure updates

## Security Considerations for Automotive

### ISO 26262 Compliance

- ASIL level support
- Safety mechanisms
- Redundancy options

### Attack Surface

- CAN bus attacks
- Physical access
- Firmware tampering
- Side-channel attacks

### Countermeasures

- Secure boot
- Message authentication
- Intrusion detection
- Secure key storage

## Vulnerability Disclosure

We follow responsible disclosure principles:

1. Private reporting
2. Coordinated fix
3. Public disclosure
4. Credit acknowledgment

## Security Updates

Security updates are released:

- Critical: Immediate
- High: Within 1 week
- Medium: Within 2 weeks
- Low: Next release

## Contact

- Email: security@automotive-rtos.com
- PGP Key: [Download](https://automotive-rtos.com/pgp-key.asc)
- Security Advisory: [View](https://automotive-rtos.com/security/advisories)

## Acknowledgments

We thank security researchers who responsibly disclose vulnerabilities:

- Researcher Name - Vulnerability Description
- Researcher Name - Vulnerability Description

## License

Security policy is part of the project license. See LICENSE file.