So, let's say I have two identical iPhones, both of them are the same model and are running the same iOS. I then proceed to have someone pull a random picture off of one of the phones without telling me which one it came from. Said picture was taken by that phone at some point that was at least a few days ago. The photo is then completely removed from the device that is originated from, leaving no trace. Given that I have access to both devices andcan therefore take an infinite number of pictures on each to compare to, is there a way, like by reading the metadata, that I can tell which one of the phones the new picture came from given that I have a picture from each?
Edit: let's assume that no one is trying to deliberately fake the metadata. The metadata is the same as what it was when the picture was taken. Lets also assume that as the moment the photo was taken, both devices where in VERY close proximity to each other.
Also, that scenario I described above is not hypothetical. I'm actually trying to do that, and I have two iPhone SEs to work with. But I've looked through the raw metadata and am having trouble finding fields that match from two photos that I know came from the same source that also don't match a photo from a different source.
Edit again: I have determined that (at least most) Apple devices do not store a serial number or any other kind of definitive distinguishers to absolutely say that two photos came from the same exact device. However, I have heard people talking about how, because of the very slight differences in each chip, it can be determined from the actual photo that two pictures were taken by the same device. Does anyone know more about this?