data in the cloud
presents a risk and safety
best to understand
...When creating an Apple ID to use with iCloud, your password must have a minimum of 8 characters, a number, an uppercase letter, and a lowercase letter. Using a strong password is the most important thing you can do to help keep your data secure. Learn more about creating a strong password.
...Apple offers an optional security enhancement for your Apple ID called two-step verification. Two-step verification requires you to verify your identity using one of your devices before you can make changes to your account information at My Apple ID, sign in to iCloud on a new device or at iCloud.com, or make an iTunes, iBooks, or App Store purchase from a new device. Learn more about two-step verification.