I just install cryptomator on my windows pc, and i create a vault on Dropbox sync folder.
If i unlock that vault, would Dropbox instantly know all the stuff inside my vault?
Hi. That would make the whole purpose of cryptomator obsolete.
Not it doesn’t. As the cloud provider does only know about your encrypted files. Even if the vault is unlocked.
Cryptomator is designed with end to end encryption. This means only encrypted files leave your device.