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Cameras that digitally sign each frame?
by Angostura 9y ago
Cameras that digitally sign each frame?
- PeterisP 9y agoAll that does is link that frame to [a key in] the particular camera. It doesn't verify that the frame was "real" in some way. It defends whoever controls [the key in] that camera from others secretly tampering with that frame afterwards, but it doesn't defend others from tampering by whoever controls [the key in] that camera. Central signature verification or blockchain could verify a timestamp - i.e. prove that the frame was taken (or maliciously created) before a particular time. That's about it.