All news with #certificate transparency tag

Merkle Tree Certificates pilot by Cloudflare and Chrome

🔐 Cloudflare is collaborating with Chrome to experimentally deploy Merkle Tree Certificates (MTCs) to reduce the number of public keys and large post-quantum signatures transmitted during TLS handshakes. MTCs batch certificates into a Merkle tree with a single signed treehead and per-certificate inclusion proofs, dramatically shrinking handshake size and CPU work. The experiment will roll out to a subset of Cloudflare free customers while Chrome distributes validation landmarks and fallbacks to preserve existing trust.

Introducing TLD Insights on Cloudflare Radar Dashboard

📊 Cloudflare Radar now offers a dedicated Top-Level Domain (TLD) landing page and per-TLD reports that aggregate popularity, activity, and security signals. The new pages rank TLDs using a DNS Magnitude score based on unique client networks querying 1.1.1.1, and provide DNS, RDAP/WHOIS, Certificate Transparency, and registration information where available. Interactive charts, maps, and API access help TLD managers and site owners monitor visibility, abuse trends, and certificate issuance.

Cloudflare Radar's Evolution: Expanding Internet Observability

📡 Since its 2020 debut, Cloudflare Radar has evolved into a comprehensive observability platform that aggregates Cloudflare telemetry to illuminate security, performance, and usage trends. Initially centered on Radar Internet Insights, Domain Insights, and IP Insights, the service has grown to include Certificate Transparency metrics, TCP reset/timeouts visibility, post-quantum adoption tracking, and AI-focused crawler analytics. Radar also added routing tools such as route leak and origin hijack detection, real-time BGP views, AS-SET monitoring, and notifications, while improving programmatic access via the Radar API and an MCP server for LLM integration. Popular utilities like the URL Scanner, expanded search and date-range options, and internationalized interfaces reinforce Radar's mission to make the Internet more observable and resilient.

Radar: regional traffic views and Certificate Transparency

🌐 Cloudflare Radar now offers regional traffic insights and expanded Certificate Transparency data to provide more granular, localized visibility into Internet health and trust. Regional views break traffic down by first-order administrative divisions (ADM1), showing bytes, requests, device (mobile/desktop) and bot/human splits, and can be joined with ASN filters in the Data Explorer. The CT dashboard, built on prior Merkle Town work, surfaces certificate volumes, CA and log-level metrics, issuance trends, signature and key algorithm distributions, and richer domain certificate details accessible via the Radar UI and API.

Unauthorized TLS Certificates Issued for 1.1.1.1 by Fina CA

🔒 Cloudflare reported that Fina CA issued twelve unauthorized TLS certificates for the public DNS IP 1.1.1.1 between February 2024 and August 2025. All certificates have been revoked and Cloudflare found no evidence they were used maliciously, noting that successful impersonation would also require client trust in Fina and interception of traffic. The misissuance was detected via Certificate Transparency logs, and Cloudflare is improving alerts, monitoring, and triage to prevent similar lapses.