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One method would be to have a unique key burned into the image sensor by the manufacturer. That key will be in turn used to cryptographically sign the raw signa
by digitallyfree 5y ago
One method would be to have a unique key burned into the image sensor by the manufacturer. That key will be in turn used to cryptographically sign the raw signal output from the sensor to verify that the image was indeed generated by that specific sensor.
Now if the image is compressed, this is obviously moot. But for important documentation and the like, it's feasible to store the signed raw signal to confirm that the image was taken by that specific camera. Of course, this depends on the security of the keystore, the trustworthiness of the manufacturer, etc.
- yjftsjthsd-h 5y ago> One method would be to have a unique key burned into the image sensor by the manufacturer. That key will be in turn used to cryptographically sign the raw signal output from the sensor to verify that the image was indeed generated by that specific sensor. This would be horrible for privacy, although somewhat mitigated if the camera program/app discarded the signature by default.
- digitallyfree 5y agoYeah it would, and ideally it should be possible for the user to choose to include the signature or not in their images. Though I wouldn't be surprised to see this type of tech being the norm in the future, perhaps in a sneaky way like what they did with printers and digital watermarking (https://en.wikipedia.org/wiki/Machine_Identification_Code https://en.wikipedia.org/wiki/Machine_Identification_Code). We may even see this in other integrated sensors like a MEMS mic with a built-in AD on the silicon.
- sudosysgen 5y agoThis isn't doable. Nothing prevents you from gluing or projecting a screen directly into the sensor, after tone mapping the image properly. There is no winning. It wouldn't even be expensive!
- BlueTemplar 5y agoYes, that has been repeatedly pointed out. And yet the industry still did it and your digital cables carrying video aren't going to work properly without the HDCP DRM.
- sudosysgen 5y agoYeah, but I can get an HDCP-compliant HDMI capture card for 8$ on Aliexpress, so I really don't care and it really doesn't work. You can also buy splitters that happen to disable HDCP.