[dogma1138]

It would be far easier to force phone and camera manufacturers to “embed” a fingerprint in the photo than to measure every sensor.

Also these fingerprints in reality are very flaky and the higher the quality of the sensor the less of a fingerprint there is to work with.

The fingerprints are also dependent on specific operating conditions which can change with firmware and operating parameters (e.g. digital zoom / cropping) as well as environmental conditions such as light levels and even temperature.

[gonesilent]

camera manufacturers already put unique QR like barcode on the sensors for lot tracking and such.

[thfuran]

Slapping a barcode on a sensor is a lot less involved than using it to take some careful measurements and then storing and retaining the results.