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It's something used for an additional layer of security (or something along those lines) here. It won't be released last I remember.

Yes, it's just an addition layer of security as Scoutie said. It's used for things like the notepad and stuff in the control panel.

And, no it won't be released in less they plan on changing that. But, if I remember correctly it's because it's very specialized and wouldn't be easy to make into something like a plugin.