App notifications on the lock screen must be turned off.

From Windows 8 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

SV-48310r1_rule App notifications on the lock screen must be turned off.

Vulnerability discussion

App notifications that are displayed on the lock screen could display sensitive information to unauthorized personnel. Turning off this feature will limit access to the information to a logged on user.

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Fix text

Configure the policy value for Computer Configuration -> Administrative Templates -> System -> Logon -> "Turn off app notifications on the lock screen" to "Enabled".

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