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The EFF's client for Let's Encrypt that automated free TLS certificates and, together with that CA, encrypted most of the web within a few years — one of the clearest security victories free software has ever delivered.
Preservation rating 76/100 What's this?The Preservation Rating scores how well this entry is archived — not how good the software is. It's calculated automatically from what's already on this page: working mirrors, documentation, a reproducible build, a clearly identified license, and complete metadata. Nothing here is entered by hand; it updates itself whenever the entry changes.
Learn more Mirror redundancy 4 out of 5 (4/5) Documentation 3 out of 5 (3/5) Reproducibility 2 out of 5 (2/5) License 5 out of 5 (5/5) Metadata 5 out of 5 (5/5)
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Checksums SHA256 + PGP Reproducible build No History Created by EFF during the rollout of Let’s Encrypt to automate certificate management. Versions 4.x Maintainers EFF & contributors Last verified 2026-07-05
Verification Not yet due — next check in 17 hours
Verified by: FKPFSignature: fkpfLast verification: July 28, 2026 11:44 PM Linux — Verified SHA-256 acme-5.6.0.tar.gz SHA-256 certbot-5.6.0.tar.gz SHA-256 certbot_apache-5.6.0.tar.gz SHA-256 certbot_dns_cloudflare-5.6.0.tar.gz SHA-256 certbot_dns_digitalocean-5.6.0.tar.gz SHA-256 certbot_dns_dnsimple-5.6.0.tar.gz SHA-256 certbot_dns_dnsmadeeasy-5.6.0.tar.gz SHA-256 certbot_dns_gehirn-5.6.0.tar.gz SHA-256 certbot_dns_google-5.6.0.tar.gz SHA-256 certbot_dns_linode-5.6.0.tar.gz SHA-256 certbot_dns_luadns-5.6.0.tar.gz SHA-256 certbot_dns_nsone-5.6.0.tar.gz SHA-256 certbot_dns_ovh-5.6.0.tar.gz SHA-256 certbot_dns_rfc2136-5.6.0.tar.gz SHA-256 certbot_dns_route53-5.6.0.tar.gz SHA-256 certbot_dns_sakuracloud-5.6.0.tar.gz SHA-256 certbot_nginx-5.6.0.tar.gz
Other — Verified SHA-256 SHA256SUMS SHA-256 SHA256SUMS.asc
Verification History July 28, 2026 11:44 PM Verified July 28, 2026 11:44 PM Verified July 27, 2026 11:26 PM Verified July 26, 2026 11:11 PM Verified July 25, 2026 10:56 PM Verified July 24, 2026 10:43 PM Verified July 22, 2026 11:35 AM Verified July 21, 2026 11:20 AM Verified July 20, 2026 11:05 AM Verified July 19, 2026 10:50 AM Verified July 18, 2026 10:35 AM Verified July 17, 2026 10:20 AM Verified July 16, 2026 10:05 AM Verified July 15, 2026 9:50 AM Verified July 14, 2026 9:35 AM Verified July 13, 2026 9:20 AM Verified July 12, 2026 8:52 AM Verified July 11, 2026 2:51 AM Verified July 10, 2026 12:00 AM Warning. certbot_dns_nsone-5.6.0.tar.gz: could not download the file. July 8, 2026 12:00 AM Verified
