From blog.elcomsoft.com
Apple ecosystem includes a comprehensive backup ecosystem that includes both local and cloud backups, and data synchronization with end-to-end encryption for some categories. Today we’ll discuss the iCloud backups, particularly targeting issues that are not covered in the official documentation.
Apple describes backups of both types in Backup methods for iPhone, iPad and iPod touch; some information specific to iCloud backups is published in How to back up your iPhone, iPad, and iPod touch with iCloud. Let’s start with basic information, and then proceed with some technical data and tips & tricks.