How to password-protect a file when you share it

A share link is convenient, but links get forwarded and pasted into chats. A password adds a second lock so the file is useless to anyone who doesn’t have it.

How to do it on Biohost

• Add your file on the homepage.
• Turn on password protection and enter a password.
• Choose an expiry and upload.
• Share the link and the password separately — ideally over different channels.

What happens behind the scenes

The password is stored hashed, never in plain text, and repeated wrong guesses are rate-limited to block brute-force attempts. The recipient must enter the password to view or download the file.

Pair it with a short expiry

A password plus a 1-day expiry is a strong combination: even if the link and password both leak, the file is gone within a day and can’t be reopened.