What it is
An SSL certificate proves a server is who it claims to be, and is what lets a site serve HTTPS. Certificates are issued by Certificate Authorities, who are meant to verify the holder's identity before signing one. The chain shows every certificate from the site's own up to a root the browser already trusts.
Why it matters
A certificate is public by design, so it doubles as a record: who issued it, when it expires, which organisation it was issued to, and often a list of other hostnames covered by the same cert. That last part regularly turns up subdomains and sister sites nobody advertised.
How this assessment works
Skopeon Labs queries public infrastructure signals and authoritative network protocols directly from external sensor nodes. All evaluations are completely non-invasive and agentless, assessing observable configurations without sending malicious payloads or disrupting service.
Operational Scope & Limitations
This check evaluates public perimeter responses observable at the time of inquiry. Endpoints protected behind third-party reverse proxies or CDNs reflect the edge configuration of the proxy layer.