Vessum

Vessum keeps your photographs, documents, and notes behind more than one passcode.

Each passcode opens a different space, with its own contents. The idea is simple: decide in advance which passcode you are willing to give away.

WHY MORE THAN ONE

If you are ever asked to unlock your phone, a single passcode gives up everything at once. Vessum lets you prepare a second space ahead of time and fill it with real, ordinary material. Hand over that passcode and whoever types it finds a complete, working app. Nothing on the phone shows that anything else is there.

EVERY SPACE IS THE SAME APP

This is the part that most apps with a decoy password get wrong. If the decoy is missing a feature the real one has, anyone who has seen the app before can spot it in seconds.

In Vessum, every space has the same settings, the same wording, and the same ability to create spaces of its own. A space lists what it created and never what created it. So there is no way to tell whether you are looking at the first space you made or one three levels beneath it.

WHAT GOES INSIDE

- Photographs from your library - Documents from Files - Notes you write in the app - Export anything back out whenever you need it - Up to 24 spaces, side by side or nested inside one another

HOW IT IS BUILT

- AES-256-GCM encryption, applied before anything is written to disk - Keys derived from your passcode with PBKDF2-HMAC-SHA256 at 150,000 iterations - Every item sealed under its own key - Storage excluded from iCloud and from computer backups - The open space closes the moment you leave the app - The app switcher preview is covered before iOS takes its snapshot

NOTHING LEAVES YOUR PHONE

Discovery signals