feat: add comprehensive security policy documentation

- Introduced SECURITY.md to outline the project's security policy, including supported versions, vulnerability reporting guidelines, and security best practices for users and developers.
- Documented security architecture, incident response procedures, and recovery protocols to enhance overall project security awareness.
- Ensured clarity and thoroughness in security considerations, limitations, and resources for both users and contributors.
- All tests passed successfully after the addition of the new documentation file.

Author: unclesp1d3r

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+
+This project maintains security updates for the following versions:
+
+| Version | Supported |
+| ------- | --------- |
+| 0.2.x   | Yes       |
+| 0.1.x   | No        |
+| < 0.1   | No        |
+
+## Reporting a Vulnerability
+
+### For Security Researchers and Users
+
+**IMPORTANT**: This is a one-person operation. Please be patient and understanding with response times.
+
+#### How to Report
+
+1. **DO** create a private GitHub security advisory for vulnerabilities
+2. **DO NOT** post about the vulnerability in public forums or social media
+3. **DO** use GitHub's security advisory feature for responsible disclosure
+4. **DO** include "SECURITY VULNERABILITY" in the advisory title
+
+#### What to Include in Your Report
+
+Please provide as much detail as possible:
+
+- **Description**: Clear explanation of the vulnerability
+- **Impact**: What could an attacker do with this vulnerability?
+- **Steps to Reproduce**: Detailed steps to demonstrate the issue
+- **Environment**: OS, Rust version, dependencies, etc.
+- **Proof of Concept**: Code or commands that demonstrate the issue (if safe to share)
+- **Suggested Fix**: If you have ideas for how to fix it
+- **Timeline**: When you discovered the issue
+- **Disclosure Preferences**: Your preferences for credit/acknowledgment
+
+#### Response Timeline
+
+- **Initial Response**: Within 48-72 hours (weekdays)
+- **Status Updates**: Weekly until resolution
+- **Fix Timeline**: Depends on severity and complexity
+- **Public Disclosure**: After fix is available and tested
+
+### For Contributors
+
+If you discover a security issue while contributing:
+
+1. **Immediately stop** any work that might exploit the vulnerability
+2. **Do not commit** any code that demonstrates the issue
+3. **Create** a private GitHub security advisory with details
+4. **Wait** for guidance before proceeding with any related work
+
+## Security Considerations
+
+### What This Tool Does (and Doesn't Do)
+
+#### Safe Operations
+
+- **Generates test data only**: All output is fake, non-functional configuration data
+- **No network access**: Tool operates entirely offline
+- **No data collection**: No telemetry, logging, or data transmission
+- **Read-only operations**: Only reads input files, never modifies existing configurations
+- **Deterministic output**: Same inputs produce same outputs (when seeded)
+
+#### Security Considerations
+
+- **File system access**: Tool reads input files and writes output files
+- **XML parsing**: Processes XML files which could contain malicious content
+- **Memory usage**: Large configurations may consume significant memory
+- **Temporary files**: May create temporary files during processing
+
+#### What This Tool Cannot Do
+
+- **Cannot access networks**: No internet connectivity or network scanning
+- **Cannot execute code**: No code execution capabilities
+- **Cannot access system resources**: No access to system files outside specified paths
+- **Cannot persist data**: No database or persistent storage
+
+### Security Best Practices
+
+#### For Users
+
+1. **Validate Input Files**: Only use trusted XML files as base configurations
+2. **Review Output**: Inspect generated configurations before using in test environments
+3. **Use Sandboxed Environments**: Run the tool in isolated test environments
+4. **Monitor Resource Usage**: Large configurations may require significant memory
+5. **Keep Updated**: Use the latest stable release for security fixes
+
+#### For Developers
+
+1. **Dependency Management**: Regularly update dependencies for security patches
+2. **Input Validation**: All user inputs are validated and sanitized
+3. **Error Handling**: Comprehensive error handling prevents information disclosure
+4. **Memory Safety**: Rust's memory safety prevents common vulnerabilities
+5. **No Unsafe Code**: Project avoids `unsafe` Rust code where possible
+
+### Known Security Limitations
+
+#### Current Limitations
+
+- **XML Processing**: Uses `quick-xml` which may have XML-related vulnerabilities
+- **File I/O**: Standard file operations with minimal validation
+- **Memory Allocation**: Large configurations may cause memory exhaustion
+- **Error Messages**: May reveal file paths in error messages
+
+#### Planned Security Improvements
+
+- [ ] Add input file validation and sanitization
+- [ ] Implement memory usage limits
+- [ ] Add secure random number generation options
+- [ ] Improve error message sanitization
+- [ ] Add configuration file integrity checks
+
+## Security Architecture
+
+### Rust Security Features
+
+This project leverages Rust's security features:
+
+- **Memory Safety**: No buffer overflows, use-after-free, or data races
+- **Type Safety**: Compile-time guarantees prevent many runtime errors
+- **Zero-Cost Abstractions**: Security features without performance overhead
+- **Safe Concurrency**: Thread-safe operations where applicable
+
+### Dependency Security
+
+#### Security Scanning
+
+- **cargo-audit**: Regular vulnerability scanning of dependencies
+- **GitHub Dependabot**: Automated security updates for dependencies
+- **Manual Review**: Regular review of new dependencies
+
+#### Dependency Policy
+
+- **Minimal Dependencies**: Only essential dependencies are included
+- **Well-Maintained**: Prefer actively maintained, widely-used crates
+- **Security Focused**: Choose crates with good security practices
+- **Regular Updates**: Keep dependencies updated to latest stable versions
+
+### Build Security
+
+#### CI/CD Security
+
+- **Secure Build Environment**: GitHub Actions with minimal permissions
+- **Dependency Scanning**: Automated vulnerability scanning in CI
+- **Artifact Verification**: Verify build artifacts before release
+- **Secrets Management**: Secure handling of any required secrets
+
+#### Release Security
+
+- **Signed Releases**: GPG-signed release artifacts (planned)
+- **Checksum Verification**: SHA256 checksums for all releases
+- **Source Verification**: Tagged releases match source code
+- **Security Notes**: Security-related changes documented in release notes
+
+## Incident Response
+
+### Security Incident Process
+
+1. **Detection**: Identify and confirm security issue
+2. **Assessment**: Evaluate severity and impact
+3. **Containment**: Prevent further exploitation
+4. **Investigation**: Determine root cause and scope
+5. **Remediation**: Develop and test fix
+6. **Recovery**: Deploy fix and verify resolution
+7. **Post-Incident**: Document lessons learned
+
+### Communication Plan
+
+#### Internal Communication
+
+- **Immediate**: Maintainer notification via email
+- **Assessment**: Technical analysis and impact evaluation
+- **Resolution**: Fix development and testing
+- **Deployment**: Release planning and coordination
+
+#### External Communication
+
+- **Users**: Security advisory via GitHub security advisories and releases
+- **Community**: Disclosure in project documentation
+- **Vendors**: Notify affected third-party dependencies
+- **Media**: No public statements unless necessary
+
+### Recovery Procedures
+
+#### Code Recovery
+
+1. **Revert Changes**: If necessary, revert to last known good state
+2. **Security Review**: Conduct thorough security review of affected code
+3. **Testing**: Comprehensive testing of fixes
+4. **Documentation**: Update security documentation
+
+#### User Recovery
+
+1. **Advisory**: Issue security advisory with details
+2. **Guidance**: Provide guidance for affected users
+3. **Support**: Offer support for migration/updates
+4. **Monitoring**: Monitor for any additional issues
+
+## Security Contacts
+
+### Primary Contact
+
+- **GitHub Security Advisory**: Create a private security advisory
+- **Response Time**: 48-72 hours (weekdays)
+- **Process**: Use GitHub's built-in security advisory workflow
+
+### Alternative Contact
+
+- **Email**: `unclespider@pm.me` (if GitHub is unavailable)
+- **Response Time**: 72-96 hours (weekdays)
+
+### PGP Key Information
+
+```text
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+[PGP key will be added when available]
+-----END PGP PUBLIC KEY BLOCK-----
+```
+
+## Security Acknowledgments
+
+### Hall of Fame
+
+Security researchers who have responsibly disclosed vulnerabilities:
+
+- [To be populated as vulnerabilities are reported and fixed]
+
+### Recognition
+
+- **Responsible Disclosure**: Credit given in security advisories
+- **Contributions**: Acknowledgment in project documentation
+- **Collaboration**: Invitation to contribute to security improvements
+
+## Security Resources
+
+### For Users
+
+- [Rust Security Best Practices](https://doc.rust-lang.org/book/ch00-00-introduction.html)
+- [OPNsense Security Documentation](https://docs.opnsense.org/)
+- [Network Security Fundamentals](https://www.rfc-editor.org/rfc/rfc4949)
+
+### For Developers
+
+- [Rust Security Guidelines](https://rust-lang.github.io/rust-clippy/master/)
+- [Cargo Security Features](https://doc.rust-lang.org/cargo/)
+- [Secure Coding Practices](https://owasp.org/www-project-secure-coding-practices-quick-reference-guide/)
+
+### For Security Researchers
+
+- [Responsible Disclosure Guidelines](https://www.first.org/global/sigs/vulnerability-coordination/responsible-disclosure)
+- [Bug Bounty Best Practices](https://hackerone.com/bug-bounty-program)
+- [Security Research Ethics](https://www.ieee.org/about/ieee-code-of-ethics.html)
+
+---
+
+**Last Updated**: August 2025\
+**Version**: 1.0\
+**Maintainer**: UncleSp1d3r (EvilBit Labs)