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Comment by voxmatt | Hacker News Reader

I think the more obvious and immediate threat to privacy is that anyone can see the contents of your facebook stream right on the lock screen; and they can even interact with the contents without unlocking the phone.

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Do we know if that's true if the phone is password protected? (Honest question, I haven't been able to watch the video.)

Android already offers lock screen widgets, so it's possible FB Home will include something to that effect that would show even while the phone is locked.

It would be entirely optional to use that widget, however, unless FB Home is able to replace the lock screen itself. As far as I know, that can't be done without rooting the device.

It's pretty clear from the website and the coverage that it does replace the lock screen itself: https://www.facebook.com/home

Now, whether or not it replaces the lock screen when it has a passcode/security, is a different story.

But, by default, your FB info is available just by tapping the unlock button/home button BUT BEFORE you unlock.

No idea. I have been looking for some indication in the coverage but there's been none that I've seen. It seems clear (see my reply before) that it replaces the lock screen when it's not password protected.

Luckily, Android's lock screen has deep dependencies (purges in-memory passwords for VPN, for example), so it can't be disabled be an app. That said, it can be prevented from appearing due to a timeout. Pressing the power button should always lock your phone.

Even if this isn't true, your friends with unlocked phones could be leaking your otherwise private posts to anyone who sees their phone.

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