Apple iCloud uses best-in-class security technologies.
◉ iCloud employs strict policies to protect all information that gets stored online.
◉ iCloud leads the industry by adopting secure, privacy-preserving technologies like end-to-end encryption.
◉ iCloud secures your information by encrypting it when it's in transit and storing it in iCloud in an encrypted format.
◉ iCloud end-to-end encryption provides the highest level of data security.
◉ No one else, not even Apple, can access end-to-end encrypted information.
Apple's Philosophy of Privacy
The CloudKit framework provides interfaces for moving data between your app and your iCloud containers. You use CloudKit to store your app’s existing data in the cloud so that the user can access the data on multiple devices. You can also store data in a public area where all users can access it.
iOS Apps created by the Nicholas Seawater Development Team use CloudKit exclusively to store data online.