| TLS_strength | Quality of TLS/SSL encryption (e.g., TLS 1.3 = strong, TLS 1.0 = weak) |
| TLS_expiry_days | Number of days before SSL certificate expiration |
| cert_self_signed | Indicates whether the certificate is self-signed (not issued by a trusted CA) |
| cert_cn | Common Name of the certificate, usually matching the domain name |
| san_count | Number of Subject Alternative Names included in the certificate |
| CSP_completeness | Coverage level of the Content Security Policy (CSP) |
| Security_headers_count | Number of security-related HTTP headers detected |
| CSRF_protection | Indicates whether CSRF protection is enabled |
| Secure_cookie_flag | Whether cookies are marked as Secure |
| CSP_header, HSTS_header, X_Frame_Options | Binary indicators for the presence of key HTTP headers |