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HSTS
Web Security
A rule that forces your browser to use HTTPS for a site.
Definition
HSTS tells your browser “always use HTTPS for this website,” so it won’t fall back to insecure HTTP.
In plain English
A rule that forces your browser to use HTTPS for a site.
Why this matters
Why it matters: It helps prevent man‑in‑the‑middle attacks that try to downgrade connections.
Example
Example: A bank website enables HSTS so logins always use HTTPS.