How Does Key&Box Work?
Imagine sending a lockable box to someone. You want them to put a file inside, but you also want to make sure only you can open it
This is true end-to-end security. The sender controls who can access the files, and no one else—not hackers, not service providers, not even us—can see inside.
Try it Now
See it in action
Sending an Open Box
You have a special kind of box that only locks once-after that, no one can open it except you.
This is like a public key-it's safe to share because it only locks the box, not unlock it.
You send the open box to someone, asking them to put a file inside.
Locking the Box
The recipient simply places the file inside and locks the box.
Once it's locked, not even they can open it again-only you can.
This ensures that no one else (not even Key & Box) can access the file.
Unlocking the Box
When the locked box comes back to you, you use your private key to open it.
The private key is like a unique key that only you own-no one else can copy it.
Now you can see the file safely, knowing that no one else could have peeked inside.
Most emails don’t encrypt your attachments—they just rely on passwords. If your email is hacked, your files are exposed. This is not a safe option.
Cloud Storage
Most file-sharing services and client portals hold the encryption keys themselves, meaning they technically have access to your files.
Key&Box
With Key and Box, only you hold the private key. Not even we can open your files—only the person who owns the private key can unlock the box.