Mobile Forensics is a department of Digital Forensics and it is concerning the acquisition and the analysis of mobile devices to recover digital evidences of investigative interest.
When we talk about Mobile Forensics usually, we use the time period “Forensically Sound”, commonly used in the forensic community to define the application of methods and strategies, which respect the international guidelines for acquisition, and examination of mobile devices. The ideas for the right application of Forensically Sound strategies assume the first purpose, which is the preservation and the possibility of non-contamination of the state of things.
All of the phases, from the acquisition to forensics evaluation of the mobile system, should totally avoid non-alteration of the examined device. This process is not simple in any respect, particularly in mobile devices.
The continual evolution of mobile units technology, permits the commercialization of new mobile phones, which creates new digital investigations problems.
Hardware and software for these type of mobile device evaluation are numerous, but none is able to offer an integrated solution for the acquisition and the forensic evaluation of all smartphones.
Furthermore, mobile devices are able to comprise plenty of digital information, virtually like a computer, so not only a call log or SMS messages as old mobile phones. Many of the digital information in a smartphone is reliant on applications put in on it, which evolve in such a range that evaluation software aren’t able to assist them completely.
Typically the data acquisition from a mobile system shouldn’t be compatible with some parameters, which define a Forensically Sound method.
In different words to have access to the mobile machine it is critical to make use of communication vectors, bootloader and different agents which are installed in the memory to enable the communication between the mobile phone and the instrument that we use for the acquisition and so it is not possible to use a write blocking option.
Often we resort on modify the machine configuration for acquisition, however this operation risks to invalidate the proof within the Court, regardless that all of the methods are always well-documented. As a lot as doable it is always fundamental to respect the worldwide guidelines on mobile forensic to ensure the evidence integrity and the repeatability of the forensic process.
A fundamental side on device preservation at the crime scene is evidence collection on site; that is the preservation of the device found turned on, safeguarding it from Wi-Fi signals, telecommunication systems, GPS signals and keeping the battery on charge. This is required to avoid its shutdown and the loss of important information such as a PIN.
The shutdown might entail a later PIN bypass or even a data loss because of passwords or cryptography. It is usually fundamental to right away provide electromagnetic isolation using faraday bags; units or cases, which allows isolating the mobile gadget, darken from radio signals.
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