---
title: "Let’s Encrypt’s Six-Day Certificates Generally Available"
url: https://daily.dev/posts/let-s-encrypt-s-six-day-certificates-generally-available-o9btvuidz
source_url: https://www.feistyduck.com/newsletter/issue_133_lets_encrypts_six_day_certificates_generally_available
type: article
source: "Feisty Duck"
published: 2026-01-29T13:44:37.372Z
updated: 2026-03-30T02:18:56.841Z
tags: ["pki", "security"]
reading_time: 5
upvotes: 0
comments: 0
language: en
---

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# Let’s Encrypt’s Six-Day Certificates Generally Available

**[Feisty Duck](https://daily.dev/sources/feistyduck)** · 5 min read · 0 upvotes · 0 comments

## Summary

Let's Encrypt now offers six-day certificates and IP address certificates in general availability. The shorter certificate lifetimes reduce the window of opportunity for attackers who compromise private keys, since certificate revocation is largely ineffective. While beneficial for high-security targets like financial institutions, these certificates require more frequent renewal (every four days), leaving less margin for error and potentially requiring weekend monitoring. Google Trust Services also supports short-lived certificates, with one-day certificates being the minimum possible. IP address certificates enable securing network devices without hostnames. Implementation is straightforward using ACME clients with profile support.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.feistyduck.com/newsletter/issue_133_lets_encrypts_six_day_certificates_generally_available>

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---

Tags: [#pki](https://daily.dev/tags/pki), [#security](https://daily.dev/tags/security)

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