The problem occurs only when there are pictures that have the time to perform their set at a later date gave you your iDevice. More specifically, to have access to pictures from the library of the iDevice's photos, on the device must be changed in the previous one making those pictures.
I was intrigued at how the app's Camera manager album WAS Able to segregate your "protected" images vs. the ones from the current session. It's like a "jail" for images. I wondered if I Could Break this image out of jail.
Turns out Apple's Restriction is just a simple filter based on the timestamp When the camera app WAS invoked . You're allowed to see all images with a timestamp Greater Than Invocation this time. That leads to immediate Yet hole year: if your iPhone's clock rolls back ever, THEN all your images with timestamps newer Than iPhone's clock will be viewable from your locked phone.
But time always moves forward, right? Why Would your phone's clock ever roll backwards?
This bug was discovered thanks to new features that Apple introduced in iOS 5 which allows users to make photos even if the device is locked, pressing the Home button twice and then access the camera icon that appears in the lockscreen.