Smartphone “Proof Mode”

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Pigeon
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Joined: Thu Mar 31, 2011 3:00 pm

Smartphone “Proof Mode”

Post by Pigeon » Thu Mar 02, 2017 2:05 am

On the technical front, what the app is doing is automatically generating an OpenPGP key for this installed instance of the app itself, and using that to automatically sign all photos and videos at time of capture. A sha256 hash is also generated, and combined with a snapshot of all available device sensor data, such as GPS location, wifi and mobile networks, altitude, device language, hardware type, and more. This is also signed, and stored with the media. All of this happens with no noticeable impact on battery life or performance, every time the user takes a photo or video. We have been running it for months on fairly old, low end phones, and you just forget it is happening.

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