Apple has begun upgrading iCloud security by sending email alerts to authorized users when it detects attempts to access these accounts.

Tim Cook, Apple's CEO, first talked about security improvements following the series of leaked nude photos from celebrities' iCloud accounts.

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The Apple security team will automatically send an email alert when an iCloud account is accessed from a web browser not from a usual device.

The email alert will prompt a user to change the password in case of unauthorized access.

An email notification is sent shortly after Apple detects web access.

"If you have not signed in to iCloud.com recently and believe someone may have accessed your account, you should reset your password at My Apple ID," said Apple.

Apple security will also send an email notification when somebody logs in from a different device. In addition, Apple will alert users that a device is restored from a backup.

So far, this is Apple's first step to improve iCloud security for its users.

Before the celebrity photo hacking scandal, Apple's security measures for iCloud included password change alerts and new recovery key generation. It also sent an email alert when a verified device is deleted or added.

These actions were pretty basic for a cloud app where important files, in this case very personal photos, could be stored.

Even the new email notifications are basic, according to skeptical iCloud users.

They suggested Apple needs to learn from advanced storage apps like Dropbox and Google. For instance, iCloud should offer access to devices recently or regularly used.

At this point, Apple has a long way to go to improve security for iCloud users. In the meantime, users should have their own security measures.

TagsiCloud, Tim Cook