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Security & SSL

Let's Encrypt

Definition

The non-profit certificate authority that made HTTPS free for everyone. It issues domain-validated TLS certificates through the automated ACME protocol; certificates last 90 days and renew themselves silently. Hosting panels — Hostrena's included — integrate it so every site gets a valid certificate at the click of a button.

Security SSL
Last updated Aug 2026

Related terms

SSL/TLS

The encryption protocol securing traffic between browsers and servers — what puts the padl...

 HTTPS

HTTP wrapped in TLS encryption — the secure version of the web's transfer protocol, runnin...

 Wildcard SSL

A single certificate that covers a domain AND all its first-level subdomains — *.example.c...