Apple corporation extends its security after nude celebrities photo leak from iCLoud last month and designed additional Two-step verification.
Apple claims that the new security steps prevents anyone from accessing or using your account, even if they know your password.
Apple sending out notification emails when iCloud accounts are accessed via web browsers.
On Apple support website FAQ explains how to use two-step verification for Apple ID.
What is two-step verification for Apple ID?
Two-step verification is an additional security feature for your Apple ID that’s designed to prevent anyone from accessing or using your account, even if they know your password.
It requires you to verify your identity using one of your devices before you can take any of these actions:
Sign in to My Apple ID to manage your account
Sign in to iCloud on a new device or at iCloud.com
Make an iTunes, iBooks, or App Store purchase from a new device
Get Apple ID related support from Apple