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TLS Certificate Lifetimes Will Officially Reduce to 47 Days (in 2029) (www.digicert.com)

submitted 2 weeks ago by [email protected] to c/[email protected]

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From today until March 15, 2026, the maximum lifetime for a TLS certificate is 398 days.

As of March 15, 2026, the maximum lifetime for a TLS certificate will be 200 days.

As of March 15, 2027, the maximum lifetime for a TLS certificate will be 100 days.

As of March 15, 2029, the maximum lifetime for a TLS certificate will be 47 days.

What's everyone's opinion on this? I think from a security standpoint their reasoning is valid and in many cases it's very easy to automate the renewal with ACME or something else. But there's likely gonna be legacy stuff still around in 2029 that won't be easy to automate.

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[–] [email protected] 67 points 2 weeks ago (9 children)

This will be so much fun for people with legacy systems

[–] [email protected] 34 points 1 week ago* (last edited 1 week ago) (6 children)

Self signed certs about to get even more popular.

[–] [email protected] 4 points 1 week ago (1 children)

Self signed certs still have to abide. It’s the browser that checks it not the issuer. Now granted in most cases you already get a non trusted warning that most sysadmins skip…

[–] [email protected] 4 points 1 week ago (2 children)

The cert is what tells the browser how long it lasts, so I'm not sure how the browser can stop you from using a 10 year self signed cert or one from your own CA

[–] [email protected] 3 points 1 week ago (1 children)

If the browser sees it expires too far in the future, it could throw a warning or error.

I doubt any of them will actually do it, but it's possible.

[–] [email protected] 4 points 1 week ago

Most browsers do this for certs with a lifetime longer than 398 days issued after 2020, which is one aspect of why so many websites use a 1 year validity period for their certs.

[–] [email protected] 1 points 1 week ago

Or just spin up a new one all the time?

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