And this is how it works:
Boxcryptor creates a virtual drive on the user’s computer that allows him to encrypt files locally before uploading them to the cloud of choice. Any file dropped into an encrypted folder within the Boxcryptor drive will be encrypted automatically before it is synced to the cloud. It can be used with several clouds, and all of them can be managed in one place, the Boxcryptor drive. The software protects data with state-of-the-art AES-256 and RSA encryption algorithms.
Private users can use Boxcryptor for free with one cloud provider on two devices. With the unlimited personal license, the number of clouds and devices is not limited, and additional features, such as filename encryption, are available. For business users and companies, there are extra features that simplify working securely in a team, as well as audit and management features.