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Cloudflare Launches Public CA for Post-Quantum Security

Cloudflare Launches Public CA for Post-Quantum Security

First seen 9 Nov 2026, 15:39 UTC • •
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ThreatCluster AI
ThreatCluster •November 9, 2026 at 15:39 UTC
  • •Cloudflare is launching a public Certificate Authority to issue post-quantum MTCs.
  • •The new CA aims to improve web security against quantum computing threats.
  • •Testing showed a 9% performance improvement using MTCs over traditional certificates.

Cloudflare has announced the development of a public Certificate Authority (CA) that will issue post-quantum Merkle Tree Certificates (MTCs). This initiative aims to enhance web security against future quantum computing threats. The new CA will support both traditional and post-quantum encryption methods, providing a seamless transition for websites. Cloudflare's testing showed a 9% improvement in performance using MTCs compared to traditional certificate chains. The CA will utilize an append-only Merkle tree for certificate data, allowing for more efficient verification processes. Cloudflare plans to integrate this CA into Chrome's quantum-resistant Root Store by early 2027. The company has also acquired key material from GlobalSign to ensure widespread trust in its certificates. This development is part of Cloudflare's efforts to address the anticipated risks posed by quantum computing to current encryption standards.

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Timeline

2026-09-29
Cloudflare announces public CA
Cloudflare declared its intent to become a public Certificate Authority supporting traditional and post-quantum MTCs.
Cloudflare
2026-11-09
Cloudflare reports MTC performance improvements
Cloudflare's testing indicated a 9% faster performance using MTCs in a Chrome experiment compared to traditional certificate chains.
InfoQ

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Common questions

What are Merkle Tree Certificates?
Merkle Tree Certificates (MTCs) are a new form of digital certificates that use an append-only Merkle tree for efficient verification.
How does this affect current web security?
This initiative aims to prepare the web for future quantum computing threats by providing a path to quantum-resistant encryption.
When will the new CA be operational?
Cloudflare targets early 2027 for the integration of its public CA into Chrome's quantum-resistant Root Store.