This paper describes the forensically relevant features of the HEIF format, including those which could be used to hide data, or cause issues in an investigation, while also providing commentary on the state of software support for the format. As HEIF is a complex container format, much different from traditional still picture formats, this leaves forensics practitioners exposed to risks of potentially mishandling evidence. However, while millions of devices across the world are already able to produce HEIF files, digital forensics research has not given the format much attention. The format is positioned to replace JPEG as the de facto image compression file type, touting many modern features and better compression ratios over the aging standard.
Finding such a number can help solve a crime and bring the perpetrator to justice.The High Efficiency File Format (HEIF) was adopted by Apple in 2017 as their favoured means of capturing images from their camera application, with Android devices such as the Galaxy S10 providing support more recently.
If an offender attempts to file off serial numbers on a firearm he used in a crime, there are scientific ways to reveal the serial number no matter how much of the number has been destroyed. Cavitation will eat away metal in the places where the metal is disordered, thus revealing the serial number. With repeated exposure, the process of cavitation starts eating away at the metal. Cavitation is the process when tiny bubbles are produced along the surface of the metal. This, it turned out, would not be a trivial task. In this method, the forensic scientist puts the firearm in a special ultrasonic bath and inundates it with super high frequency vibrations. Achim Baqu, who maintains the Apple-1 Registry (a listing of all Apple 1 computers), finally decided to try to solve the mystery. Ultrasonic cavitation method–This particular method is a destructive method like chemical etching.If the forensic scientist overindulges in this method, he can destroy the evidence for good. Steve Wozniak said that he didn’t write them.
Apple geeks may be aware of the mystery of the handwritten Apple 1 serial number present on some of the surviving machines.
This method is disadvantageous because it changes the physical makeup of the evidence. Handwritten Apple 1 serial number mystery finally solved by forensic analysis. Applying an electrical current (electrochemical etching) speeds up the process. The solution etches the disordered metal quicker than the metal around it. Chemical and electrochemical etching method–The forensic firearm examiner paints what is known as an etching solution over the area in question.This method is advantageous because it is not destructive and does not change the weapon in any way. This reveals the location of the hidden serial number. These particles tend to settle in places where the metal is disordered. He then sprays the firearm with an oil that suspends any iron-like particles. Magnetizing produces ripples of magnetic forces used to locate where the metal is disordered from the pressure stamping process. Magnaflux method–The forensic scientist first magnetizes the firearm.There are three methods for revealing missing serial numbers: Finally, each user and group are also assigned a number in the ZEXTRA field. All the methods have a common denominator: Whenever metal is pressure stamped, not only does the metal have indentations of numbers, but the metal underneath the numbers contains resultant structural abnormalities. Keywords: Kik, Instant messaging, iOS, Mobile device forensics, Apple. There are several methods that forensic firearms investigators use at their disposal for finding hidden serial numbers. Crooks that scratch off the serial numbers of their firearms are not as smart as they believe.