Certificate Transparency Policy

1–30 of 394

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

Martijn Katerbarg2

Nov 30

Maintenance and temporary submission block for Mammoth2025h1

All, Please note: Normal operation for Mammoth2025h1 has been restored. We will continue monitoring

unread,

Maintenance and temporary submission block for Mammoth2025h1

All, Please note: Normal operation for Mammoth2025h1 has been restored. We will continue monitoring

Nov 30

Filippo Valsorda

Nov 26

Rome2024h2, Rome2025h1, and Rome2025h2 downtime incident report

Hey all, The Rome prototype Sunlight instance experienced a little over four hours of downtime today

unread,

Rome2024h2, Rome2025h1, and Rome2025h2 downtime incident report

Hey all, The Rome prototype Sunlight instance experienced a little over four hours of downtime today

Nov 26

Joe DeBlasio, … Vincent Calderone7

Nov 25

Upcoming policy and log list schema changes to support static-ct-api logs in Chrome

On Mon, Nov 25, 2024, 6:38 PM Joe DeBlasio <jdeb...@chromium.org> wrote: Thanks, Andrew, and

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Upcoming policy and log list schema changes to support static-ct-api logs in Chrome

On Mon, Nov 25, 2024, 6:38 PM Joe DeBlasio <jdeb...@chromium.org> wrote: Thanks, Andrew, and

Nov 25

Chuck Blevins, Andrew Ayer2

Nov 25

Yeti2025 and Nessie2025 performance improvements

On Mon, 25 Nov 2024 09:33:51 -0800 (PST) Chuck Blevins <crb...@gmail.com> wrote: > DigiCert

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Yeti2025 and Nessie2025 performance improvements

On Mon, 25 Nov 2024 09:33:51 -0800 (PST) Chuck Blevins <crb...@gmail.com> wrote: > DigiCert

Nov 25

Nov 25

TrustAsia Log2024 service and data migration announcement

Dear All, We are planning service and data migration for TrustAsia Log2024 (https://ct2024.trustasia.

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TrustAsia Log2024 service and data migration announcement

Dear All, We are planning service and data migration for TrustAsia Log2024 (https://ct2024.trustasia.

Nov 25

Martijn Katerbarg2

Nov 23

Temporary submission block for Sabre2025h1

All, Please note: Normal operation for Sabre2025h1 has been restored. We will continue monitoring the

unread,

Temporary submission block for Sabre2025h1

All, Please note: Normal operation for Sabre2025h1 has been restored. We will continue monitoring the

Nov 23

Filippo Valsorda, … Luke Valenta23

Nov 20

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

Hi Matthew, I'm seeing some 400 responses to our add-(pre-)chain requests, which looks like we

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

Hi Matthew, I'm seeing some 400 responses to our add-(pre-)chain requests, which looks like we

Nov 20

Andrew Ayer, … Joe DeBlasio9

Oct 31

Sabre 2025h1 MMD violation

Thanks, Rob. A postgres backend does seem encouraging, though I'm a bit worried about

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Sabre 2025h1 MMD violation

Thanks, Rob. A postgres backend does seem encouraging, though I'm a bit worried about

Oct 31

umar, Philippe Boneff2

Oct 28

Cloudflare and Other operators previous Years Ctlogs

Hi Umar, Some of these logs are still online, others are still mirrored by Google: https://github.com

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Cloudflare and Other operators previous Years Ctlogs

Hi Umar, Some of these logs are still online, others are still mirrored by Google: https://github.com

Oct 28

Dina Kozlov, … Roger Ng3

Oct 25

Retiring Nimbus 2022

Hi Umar, You can find nimbus2022 and nimbus2023 CT mirror logs in the mirror section of this known

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Retiring Nimbus 2022

Hi Umar, You can find nimbus2022 and nimbus2023 CT mirror logs in the mirror section of this known

Oct 25

Martijn Katerbarg2

Oct 25

Scheduled outage of Mammoth2025h1

All, The maintenance for Mammoth2025h1 has been completed. Regards, Martijn Katerbarg Sectigo From:

unread,

Scheduled outage of Mammoth2025h1

All, The maintenance for Mammoth2025h1 has been completed. Regards, Martijn Katerbarg Sectigo From:

Oct 25

Chuck Blevins, Philippe Boneff3

Oct 22

Availability drop in Wyvern 2024h2

Thanks for the feedback, Philippe. We'll look into this. Cheers Chuck On Tuesday, October 22,

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Availability drop in Wyvern 2024h2

Thanks for the feedback, Philippe. We'll look into this. Cheers Chuck On Tuesday, October 22,

Oct 22

Oct 10

CT Talks Livestream at Transparency.dev Summit

Hi, For those who can't join us in London for the transparency.dev summit but still want to see

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CT Talks Livestream at Transparency.dev Summit

Hi, For those who can't join us in London for the transparency.dev summit but still want to see

Oct 10

Matthew McPherrin

Oct 9

Let's Encrypt Oak 2024h1 Shutdown on or after Oct 18th.

Let's Encrypt Oak 2024h1 will be shut down on or after October 18th, which is 90 days after the

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Let's Encrypt Oak 2024h1 Shutdown on or after Oct 18th.

Let's Encrypt Oak 2024h1 will be shut down on or after October 18th, which is 90 days after the

Oct 9

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

unread,

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

unread,

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;

unread,

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

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