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Joined 1 year ago
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Cake day: June 21st, 2023

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  • Apps can get woken up when a remote notification arrives that has the content-available key. Apps are woken up in background mode, at which point they have a few seconds to do whatever they need to do to refresh their content cache. This, of course, often leads to the app making a connection to the server, which exposes the user’s IP address.

    I think the sin here is that some apps always set the content-available key regardless of whether there is content to be retrieved or not. That turns the notification into a surveillance tool, allowing the app to check in periodically.