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Make or open a password-protected zip STRONGBOX

Put files into a zip locked with AES-256, as WinZip and 7-Zip write it, or open a password-protected zip and save what is inside.

Make a locked zip

Add files or a folder, choose a passphrase, and the zip is written on this device.

Drop files or a folder here Any kind of file, any number. Nothing is uploaded.

Open a locked zip

Drop the zip, type its passphrase, and save one file or all of them.

Drop a zip here, or choose one The names inside are listed first; the passphrase is needed to read the files.

How it works

STRONGBOX makes a zip locked with AES-256, written the way WinZip and 7-Zip write it, so the person you send it to can open it with the tools they already have. It also opens a password-protected zip and saves what is inside. The older ZipCrypto lock is weak, and a long passphrase matters more than anything else. Forget the passphrase and the files are gone.

The guides: Why Windows will not open your AES-encrypted zip and Password protect a zip, and what it still gives away

Doing this often? The OBSCURA Sovereign Suite seals files so that only the person with the passphrase opens them, with stronger encryption than a zip. On its own, US$4 a month; with everything else, US$9 a month or US$79 a year. 7 days free.