Double-clicking on a protected file triggers VIDA to begin re-assembling the unique private key for it.
Without the private key, all you (or your attacker) would see is this.
To re-assemble the private key, VIDA begins by contacting your linked devices, each of which holds a fragment of that key.
Each linked device will then request your approval. One tap on big green 'Approve' button and the fragments of the private key are securely transmitted back to your computer.
Once VIDA receives all of the correct private key fragments, they're instantly re-assembled on your computer and used to decrypt and open the file.