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Protect a file

SuperSecure turns any file into a SuperFile: the original, wrapped in split-key encryption, with the owner's control travelling inside it. This page is about what happens the moment you drop a file in, and where it lives afterwards.

#Drop a file

Sign in at beta.supersecure.com and drop a file anywhere in your workspace (the workspace is /account; the sidebar is open by default). You can also drop files on the landing deck before signing in — they wait in a drafts vault on that device and are migrated into your account the moment you sign in.

What happens:

  1. The file is sealed with AES-256 under a key that is split: one half stays with your side, one half with SuperFile. Neither half opens the file alone, so SuperFile cannot read your document and neither can anyone who steals a copy.
  2. The extension gains an s: quarterly-report.pdf becomes quarterly-report.pdfs, deck.pptx becomes deck.pptxs. If you own a branded extension, the file carries it instead.
  3. Every page, image and video clip inside the document is packaged for the protected viewer and, where the platform supports it, hardware DRM — see The viewer & DRM.
  4. Personal data inside the document is classified so the compliance trail can say what kind of information each file holds.

The file appears in your vault immediately; packaging for the viewer finishes in the background.

#Any file

Documents (PDF, Word, PowerPoint, spreadsheets), images, audio and video, archives, and structured or unstructured data exports. Video is re-encoded into protected streams; documents are rendered page by page.

#Where files live

  • Your vault — the workspace at /account, with folders, rename, right-click actions, starring, projects and archive. Deleting moves a file to the trash first; emptying the trash deletes it.
  • SuperDocs — documents you author inside SuperSecure, protected from the first keystroke.
  • A file's link — every file has a stable address of the form /<owner @name>/<file> that only opens for people on its share list.

Files are never left behind on a device in the clear. The viewer keeps an encrypted offline cache that is flushed on sign-out.

#Ownership

The account that sealed a file owns it. Ownership does not move with a transferred extension, and a company slug never owns a file — a person in that company does. The owner is the only one who can share, unshare, see the trail or delete.

Updated September 2026