Certificate Transparency Policy

1–30 of 370

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

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Filippo Valsorda, … Andrew Ayer24

Jun 21

The Sunlight CT log implementation and monitoring API

On Fri, 07 Jun 2024 17:27:46 +0200 "Filippo Valsorda" <fil...@ml.filippo.io> wrote:

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The Sunlight CT log implementation and monitoring API

On Fri, 07 Jun 2024 17:27:46 +0200 "Filippo Valsorda" <fil...@ml.filippo.io> wrote:

Jun 21

Jun 14

Mammoth2025h1 log entry 1021714 later timestamp than next STH

Hi folks, We noticed an entry in the mammoth2025h1 log which had a timestamp ahead of the bounding

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Mammoth2025h1 log entry 1021714 later timestamp than next STH

Hi folks, We noticed an entry in the mammoth2025h1 log which had a timestamp ahead of the bounding

Jun 14

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

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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

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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

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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

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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

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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

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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

Martijn Katerbarg, Rob Stradling3

Jan 12

Mammoth2024h1 CT log has stopped accepting new entries

Apologies for the formatting issues in that incident report, especially in the Action Items section.

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Mammoth2024h1 CT log has stopped accepting new entries

Apologies for the formatting issues in that incident report, especially in the Action Items section.

Jan 12

12/22/23

Moderation for ct-policy

Hello folks, Due to an influx of spam, I've turned up the moderation settings for ct-policy@

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Moderation for ct-policy

Hello folks, Due to an influx of spam, I've turned up the moderation settings for ct-policy@

12/22/23

Carlos Joan Rafael Ibarra Lopez, … Lanh Huynh6

12/21/23

New availability requirements for logs trusted by Chrome coming into effect March 31, 2024

Hi Xiaoming, The user agent performing the requests is the same as the existing merge delay monitor (

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New availability requirements for logs trusted by Chrome coming into effect March 31, 2024

Hi Xiaoming, The user agent performing the requests is the same as the existing merge delay monitor (

12/21/23

11/29/23

Rejecting DigiCert Yeti 2023 CT Log Shard in Chrome

Following on the previous transition of the DigiCert Yeti2023 Log (https://yeti2023.ct.digicert.com/

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Rejecting DigiCert Yeti 2023 CT Log Shard in Chrome

Following on the previous transition of the DigiCert Yeti2023 Log (https://yeti2023.ct.digicert.com/

11/29/23

Dina Kozlov, … Lanh Huynh34

11/28/23

Cloudflare Nimbus outage

Vào 8:30, Th 3, 28 thg 11, 2023 Matt Palmer <mpa...@hezmatt.org> đã viết: On Mon, Nov 27, 2023

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Cloudflare Nimbus outage

Vào 8:30, Th 3, 28 thg 11, 2023 Matt Palmer <mpa...@hezmatt.org> đã viết: On Mon, Nov 27, 2023

11/28/23

blanka.sarajova1954

11/7/23

Odesláno z mého zařízení Galaxy

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Odesláno z mého zařízení Galaxy

11/7/23

Q Misell, Devon O'Brien2

11/3/23

Cloudflare logs MMD

This issue has been acknowledged by Cloudflare and further conversation will take place in response

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Cloudflare logs MMD

This issue has been acknowledged by Cloudflare and further conversation will take place in response

11/3/23

11/1/23

Shutting down Oak 2022

Hi everyone, This is to announce that we'll be shutting down our Oak 2022 CT log shard two weeks

unread,

Shutting down Oak 2022

Hi everyone, This is to announce that we'll be shutting down our Oak 2022 CT log shard two weeks

11/1/23

10/25/23

Shutting down Sapling 2022h2 and 2023h1

Howdy everyone, We'll be shutting down our Sapling 2022h2 and Sapling 2023h1 CT log shards

unread,

Shutting down Sapling 2022h2 and 2023h1

Howdy everyone, We'll be shutting down our Sapling 2022h2 and Sapling 2023h1 CT log shards

10/25/23

Jimmy wang, … Joe DeBlasio3

10/24/23

How does the certificate transparency check in Chrome work?

Hi David, That's correct -- no SCT auditing happens when users have opted out of Safe Browsing

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How does the certificate transparency check in Chrome work?

Hi David, That's correct -- no SCT auditing happens when users have opted out of Safe Browsing

10/24/23

10/11/23

Monitoring "missing" accepted roots

The Chrome CT Log Policy expects logs "to accept logging submissions from CAs that are trusted

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Monitoring "missing" accepted roots

The Chrome CT Log Policy expects logs "to accept logging submissions from CAs that are trusted

10/11/23

Carlos Joan Rafael Ibarra Lopez

10/6/23

Announcing new availability monitoring and requirements for logs trusted by Chrome

Hi ct-policy@, Chrome is changing how we monitor logs for compliance with our requirements, and while

unread,

Announcing new availability monitoring and requirements for logs trusted by Chrome

Hi ct-policy@, Chrome is changing how we monitor logs for compliance with our requirements, and while

10/6/23

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