The file is divided, encrypted and uploaded to each cloud (user) specified by the user. Since the password differs for each divided file, decryption by malicious users results impossible.
Your file is anlayzed by DZ.
The file is split, encrypted and
distributed by DZ.
The different parts of the file are distributed in different clouds.
DZ performs the authentication to authorize the legitimate owner to restore it.
Only the legitimate owner authenticated with DZ Authentication can restore the file.