Your phone's camera has a unique ID you never knew about
Did you know that your phone can be identified by the pictures you take with it? No, we don't mean determining the device's brand and model through image EXIF data, that's simple stuff, we're talking about identifying the exact phone a picture was taken with by simply analyzing the photo. Doesn't matter if there are millions of people around the world with same model smartphone that you have, shooting dozens of pictures every day, because no two cameras can take the same photo. Even if you take a pair of phones of the same model and somehow manage to align them perfectly in order take two seemingly identical pictures of the exact same scene within milliseconds of each other, the results will still differ greatly when examined with special software. This is what scientists are now referring to as a “camera fingerprnt” and you can find out your phone's unique camera ID by downloading a simple app called CamFinger.
This is what the camera fingerprint of one of our Galaxy S6 units looks like. It may not look like much to the human eye, but specialized image analysis software like CamFinger is capable of interpreting the noisy image and connect it to a particular device
Using CamFinger, a dozen images can be stacked on top of each other and filtered down to what looks like a random image of visual snow, which is actually the unique pattern of dark and bright dots intrinsic to the camera sensor in your device. Much like fingerprints, the sensor's ID remains the same for the entirety of its lifetime and can be used to identify it, hence the moniker “camera fingerprint.”
If you want to find out the unique ID of your phone's camera and learn more about the whole process, you can download CamFinger and give it a try for yourself. All data collected by the app is anonymous and once you get your “camera fingerprint,” you can compare it to those of other anonymous contributors to the project.