The other day I tried to snap photos from my webcam with my finger obstructing the objective. I looked at the files in binary and it was apparently always different (the image itself looked visually always the same though : full black).
I made a hash of an hundred files made this way and could not find any collision.
You'd probably want to make sure that the noise you see in the images is truly random (e.g. caused by cosmic rays or heat), rather than power supply or EMI noise.
Comments
The other day I tried to snap photos from my webcam with my finger obstructing the objective. I looked at the files in binary and it was apparently always different (the image itself looked visually always the same though : full black).
I made a hash of an hundred files made this way and could not find any collision.
Could this be considered as a TRNG?
Yes, I know there have been projects that try to use this as a source of entropy:
https://medium.com/the-physics-arxiv-blog/quantum-random-num...
You'd probably want to make sure that the noise you see in the images is truly random (e.g. caused by cosmic rays or heat), rather than power supply or EMI noise.