Certificate Transparency Policy

1–30 of 382

Please note, this list is for discussions and announcements related to policies and support for Certificate Transparency (RFC 6962) within Chromium-based and Firefox-based browsers. This includes discussions of requirements for Logs, as well as requirements for CAs' support for CT.

For more information, see https://sites.google.com/a/chromium.org/dev/Home/chromium-security/certificate-transparency

For bug reports and discussions of bugs related to Chromium, please use https://code.google.com/p/chromium/issues/entry

For bug reports and discussions of bugs related to Firefox, please use https://bugzilla.mozilla.org/enter_bug.cgi

For discussions of the technical details of Certificate Transparency, please use the IETF TRANS mailing list, https://www.ietf.org/mailman/listinfo/trans

0 selected

Filippo Valsorda, … Matthew McPherrin4

Oct 3

Static CT API v1.0.0-rc.1 and Sunlight v0.3.1

Let's Encrypt is now running three logs on Sunlight v0.3.1, implementing the v1.0.0-rc.1

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Static CT API v1.0.0-rc.1 and Sunlight v0.3.1

Let's Encrypt is now running three logs on Sunlight v0.3.1, implementing the v1.0.0-rc.1

Oct 3

Aug 30

Register for the Transparency.dev Summit

Hi all, I'm Tracy and I'm working with the TrustFabric team to host the Transparency.dev

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Register for the Transparency.dev Summit

Hi all, I'm Tracy and I'm working with the TrustFabric team to host the Transparency.dev

Aug 30

Adriano Santoni, Andrew Ayer4

Aug 29

Sphinx 2052h2 and Apple iOS

On Thu, 29 Aug 2024 17:17:55 +0200 Adriano Santoni <asant...@gmail.com> wrote: > That

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Sphinx 2052h2 and Apple iOS

On Thu, 29 Aug 2024 17:17:55 +0200 Adriano Santoni <asant...@gmail.com> wrote: > That

Aug 29

Aug 28

Announcing Newly Qualified Log

The Cloudflare Nimbus2026 log (https://ct.cloudflare.com/logs/nimbus2026) has been approved for

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Announcing Newly Qualified Log

The Cloudflare Nimbus2026 log (https://ct.cloudflare.com/logs/nimbus2026) has been approved for

Aug 28

Carlos Joan Rafael Ibarra Lopez2

Aug 26

Announcing Newly Qualified Logs

Four new CT Logs have been approved for inclusion in Chrome, having completed their application and

unread,

Announcing Newly Qualified Logs

Four new CT Logs have been approved for inclusion in Chrome, having completed their application and

Aug 26

Martijn Katerbarg

Aug 26

Shutting down Sabre2024h1, Mammoth2024h1 and Mammoth2024h1b

All, The Sabre2024h1, Mammoth2024h1 and Mammoth2024h1b log shards are now outside of their

unread,

Shutting down Sabre2024h1, Mammoth2024h1 and Mammoth2024h1b

All, The Sabre2024h1, Mammoth2024h1 and Mammoth2024h1b log shards are now outside of their

Aug 26

Joe DeBlasio, Andrew Ayer2

Aug 19

What Chrome is thinking about CT in 2024 and beyond

This sounds like a great plan to me! Sunglasses, the RFC 6962 compatibility proxy <https://github.

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What Chrome is thinking about CT in 2024 and beyond

This sounds like a great plan to me! Sunglasses, the RFC 6962 compatibility proxy <https://github.

Aug 19

Aug 9

Removing (Rejecting) Expired CT Log Shards

The following CT log shards are now outside of their certificate expiry range and will be removed

unread,

Removing (Rejecting) Expired CT Log Shards

The following CT log shards are now outside of their certificate expiry range and will be removed

Aug 9

Aug 6

A New CT Log + Request For Help

Hi ct-policy@, I have built a new CT log implementation which conforms to both RFC6962 and the new

unread,

A New CT Log + Request For Help

Hi ct-policy@, I have built a new CT log implementation which conforms to both RFC6962 and the new

Aug 6

Joe DeBlasio, Chris Thompson2

Jul 29

Announcing Newly Qualified Logs

Several new CT Logs have been approved for inclusion in Chrome, having completed their application

unread,

Announcing Newly Qualified Logs

Several new CT Logs have been approved for inclusion in Chrome, having completed their application

Jul 29

Luke Valenta, Rob Stradling2

Jul 4

Mammoth2025h1 log entry 1021714 later timestamp than next STH

Thanks Luke for posting this report. RFC6962 section 3.5 says that an STH's "timestamp MUST

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Mammoth2025h1 log entry 1021714 later timestamp than next STH

Thanks Luke for posting this report. RFC6962 section 3.5 says that an STH's "timestamp MUST

Jul 4

Joe DeBlasio, Mustafa Emre Acer2

Jul 1

Announcing Newly Qualified Logs

Two new CT Logs have been approved for inclusion in Chrome, having completed their application and

unread,

Announcing Newly Qualified Logs

Two new CT Logs have been approved for inclusion in Chrome, having completed their application and

Jul 1

Andrew Ayer, … Chuck Blevins7

Jul 1

Unable to retrieve entries from Wyvern and Sphinx

On Mon, 1 Jul 2024 11:26:09 -0700 (PDT) Chuck Blevins <crb...@gmail.com> wrote: > Digicert

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Unable to retrieve entries from Wyvern and Sphinx

On Mon, 1 Jul 2024 11:26:09 -0700 (PDT) Chuck Blevins <crb...@gmail.com> wrote: > Digicert

Jul 1

Filippo Valsorda, … Seo Suchan30

Jun 28

The Sunlight CT log implementation and monitoring API

By mistake sent old own as private, so wrote it again as public for SANs I think inserting indivisual

unread,

The Sunlight CT log implementation and monitoring API

By mistake sent old own as private, so wrote it again as public for SANs I think inserting indivisual

Jun 28

May 9

Hi Jeremy, We received the applications and I am processing them this week. Apologies for the delay;

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Hi Jeremy, We received the applications and I am processing them this week. Apologies for the delay;

May 9

May 3

Feedback on Merkle Town (ct.cloudflare.com)

Hi folks, Cross-posting from the certificate-transparency list for visibility: https://groups.google.

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Feedback on Merkle Town (ct.cloudflare.com)

Hi folks, Cross-posting from the certificate-transparency list for visibility: https://groups.google.

May 3

May 1

Re: [ct-policy] Digest for ct-policy@chromium.org - 1 update in 1 topic

Vào 1:07, Th 5, 2 thg 5, 2024 <ct-p...@chromium.org> đã viết: ct-p...@chromium.org Google

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Re: [ct-policy] Digest for ct-policy@chromium.org - 1 update in 1 topic

Vào 1:07, Th 5, 2 thg 5, 2024 <ct-p...@chromium.org> đã viết: ct-p...@chromium.org Google

May 1

May 1

Shutting down Sabre (https://sabre.ct.comodo.com/)

> 2024-05-01 14:00:00 UTC: Transition from Usable to ReadOnly. (Stop accepting add-chain and add-

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Shutting down Sabre (https://sabre.ct.comodo.com/)

> 2024-05-01 14:00:00 UTC: Transition from Usable to ReadOnly. (Stop accepting add-chain and add-

May 1

Apr 15

Shut down the log2022 and log2023

Dear all: I'm the TrustAsia CT log operator. We're plan to shut down the old CT Logs after

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Shut down the log2022 and log2023

Dear all: I'm the TrustAsia CT log operator. We're plan to shut down the old CT Logs after

Apr 15

Apr 6

Re: [ct-policy] Digest for ct-policy@chromium.org - 1 update in 1 topic

Vào 1:07, CN, 7 thg 4, 2024 <ct-p...@chromium.org> đã viết: ct-p...@chromium.org Google

unread,

Re: [ct-policy] Digest for ct-policy@chromium.org - 1 update in 1 topic

Vào 1:07, CN, 7 thg 4, 2024 <ct-p...@chromium.org> đã viết: ct-p...@chromium.org Google

Apr 6

Apr 3

Call for 2026 CT Log Shards

Hi ct-policy@, We are now inviting applications for inclusion of 2026 log shards. While we have some

unread,

Call for 2026 CT Log Shards

Hi ct-policy@, We are now inviting applications for inclusion of 2026 log shards. While we have some

Apr 3

Ben Cartwright-Cox, … Luke Valenta5

Apr 3

Does heavy rate limiting count as CT Log unavailability?

Hi Ben, Apologies for the slow response. For the Nimbus logs, the current rate-limiting policy allows

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Does heavy rate limiting count as CT Log unavailability?

Hi Ben, Apologies for the slow response. For the Nimbus logs, the current rate-limiting policy allows

Apr 3

Mar 26

Cloudflare Nimbus Outage

The incident has been resolved. The Nimbus logs came back online and recovered around 2:17 UTC. On

unread,

Cloudflare Nimbus Outage

The incident has been resolved. The Nimbus logs came back online and recovered around 2:17 UTC. On

Mar 26

Martijn Katerbarg

Mar 13

Mammoth scheduled maintenance window and incident report

All, Through this message we would like to inform the community of an upcoming maintenance window

unread,

Mammoth scheduled maintenance window and incident report

All, Through this message we would like to inform the community of an upcoming maintenance window

Mar 13

Feb 27

Shutting down Sapling 2023h2 and Oak 2023

Howdy everyone, This is to announce that we'll be shutting down our Sapling 2023h2 and Oak 2023

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Shutting down Sapling 2023h2 and Oak 2023

Howdy everyone, This is to announce that we'll be shutting down our Sapling 2023h2 and Oak 2023

Feb 27

Dina Kozlov, … Amir Omidi5

Feb 15

Cloudflare Nimbus 2024 & 2025 CT Log Maintenance Window — Feb 15

Thank you & the team at Cloudflare for ensuring we have failovers for CT now :) On Thu, Feb 15,

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Cloudflare Nimbus 2024 & 2025 CT Log Maintenance Window — Feb 15

Thank you & the team at Cloudflare for ensuring we have failovers for CT now :) On Thu, Feb 15,

Feb 15

Mustafa Emre Acer

Feb 14

Announcing Newly Qualified Log

A new CT Log has been approved for inclusion in Chrome, having completed their application and

unread,

Announcing Newly Qualified Log

A new CT Log has been approved for inclusion in Chrome, having completed their application and

Feb 14

Feb 1

Removing old CT logs

Hi ct-policy@, The following CT log shards have been expired or shut down by the log operator and

unread,

Removing old CT logs

Hi ct-policy@, The following CT log shards have been expired or shut down by the log operator and

Feb 1

Bret McGee, … Philippe Boneff7

Jan 31

Cloudflare Nimbus 2024 & 2054 get-sth not consistent ?

Hi Dina, The get-sth logs in my database this morning still exhibit the same chronological ordering

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Cloudflare Nimbus 2024 & 2054 get-sth not consistent ?

Hi Dina, The get-sth logs in my database this morning still exhibit the same chronological ordering

Jan 31

Carlos Joan Rafael Ibarra Lopez, … Andrew Ayer3

Jan 12

Announcing the retirement of Sectigo Mammoth 2024 H1 Log effective January 29, 2024

Hi Matt, On Sat, 13 Jan 2024 00:11:34 +0000 Matt Palmer <mpa...@hezmatt.org> wrote: > Given

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Announcing the retirement of Sectigo Mammoth 2024 H1 Log effective January 29, 2024

Hi Matt, On Sat, 13 Jan 2024 00:11:34 +0000 Matt Palmer <mpa...@hezmatt.org> wrote: > Given

Jan 12

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