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The data presented here is derived from Certificate Transparency logs currently monitored by Cloudflare. Learn how CT monitoring works.
Certificate characteristics
Copy linkInformation on the technical makeup of certificates
Certificate issuance
Copy linkCertificate issuance is the process by which CAs generate digital certificates for domain owners. CAs are often operated by larger organizations, who may manage multiple subordinate CAs under a single corporate umbrella
Certificate Transparency logs
Copy linkCT logs are "append-only" and publicly-auditable ledgers of certificates being created, updated, and expired
Certificate coverage
Copy linkA certificate can cover multiple top-level domains (TLDs), include wildcard entries, and support IP addresses in Subject Alternative Names (SANs)
Latest Certificates Transparency blog posts
Copy linkPosts tagged with "Certificates Transparency" from the Cloudflare blog
Cloudflare Radar now offers a Certificate Transparency dashboard for monitoring TLS certificate activity, and new regional traffic insights for a sub-national perspective on Internet trends.
David Belson, André Jesus, Luke Valenta
Unauthorized TLS certificates were issued for 1.1.1.1 by a Certification Authority without permission from Cloudflare. These rogue certificates have now been revoked.
Joe Abley, Thibault Meunier, Vicky Shrestha, Bas Westerbaan
Learn about recent developments in Certificate Transparency (CT), and how we built a next-generation CT log on top of Cloudflare's Developer Platform.
Luke Valenta
