OP said this could be a way to address fake news, and I agree, but there is a component missing. What is needed is a system on a chip that immediately encrypts

OP said this could be a way to address fake news, and I agree, but there is a component missing. What is needed is a system on a chip that immediately encrypts, signs and uploads any image (or video or audio) shot from the camera to a distributed public record, like a blockchain or IPFS. That gets you a creation timestamp and an unaltered source image that can be verified later if the author releases the decryption key. Without having a SoC doing everything at once, any image that gets encrypted is already suspect. I’ll be surprised if devices like this don’t start appearing over the next few years, either for adoption by journalists or forced onto police. Apple is in a good position to do this with their devices, since their t2 chip is already managing authentication and the camera + microphone.