We should discuss crime scene investigation, cameras, and how point and shoot cameras may really secure your privacy a bit superior to cell phone camera applications. Does that sound unusual? It is – and we’re simply beginning.
Initially, the criminology: it’s a procedure called PRNU, or photo-reaction non-consistency. Essentially, when you take a gander at a photograph, even a computerized photograph that is never observed a print-out, there are little defects on top of it. Those imperfections are made by numerous variables, however various them include the software and equipment of the camera used to take the photos.
You can probably see where this is going. Like identifying a fingerprint or a fired bullet, forensic specialists can use a photograph to identify the exact device it was taken on. They carefully examine all the pixels that are slightly different (usually lighter or darker than expected), and compare those pixels to new photos taken by devices to find a match. The differences are so small that humans can see them by looking, so specialized software does the job instead.
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This can quickly identify what device took incriminating photos, for example – but here’s where it gets interesting. According to research done on both iPhones and Samsung Galaxy Note device, it’s far, far easier to identify smartphones with this process. For a regularly camera, it takes about 50 photos per camera to analyze before an authentic match can be made. For smartphones, however, you only need one photo and it can be successfully matched with the phone that took it. Results in either case are around 99.5% accurate. This PRNU approach has potential for future ID protection too, so it’s not all about catching bad guys or going on a hunt for the right device. In fact, this could make it much more difficult to steal digital identities and use funds to buy stuff…if you have the wrong smartphone. Here’s hoping the tech will be get there quickly!