It stops iOS from saving screenshots of the app when it closes. When an app laun... | Hacker News

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		dguido on March 2, 2015 \| parent \| context \| favorite \| on: Signal 2.0 released with private messaging support It stops iOS from saving screenshots of the app when it closes. When an app launches on iOS, it initially draws the UI from a saved screenshot while the app is loading. This creates a privacy risk since that image may contain sensitive info.

marknutter on March 2, 2015 [–]

Oh, wow, I thought it was some sort of lock screen for the app. There should be a description.

cheald on March 2, 2015 | [–]

TextSecure has the option to lock the app after a timeout (or on command), and not unlock it until a passcode is given. I suspect Signal has something similar.

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