Análisis digital forense de los sensores de un teléfono inteligente para la detección y recreación de actividad motriz inusual en una localización determinada

Abstract

The objective of this research is to develop a new methodology in order to detect and recreate unusual motor activity from a possible victim in a determined location. This work is framed within the field of digital forensic analysis, branch of criminology which is in charge of obtaining potential digital evidence from electronic devices with criminal purposes by applying a set of adequate techniques and procedures. This work has as its base the use of information obtained from a smartphone, so in first instance an application for the Android operative system is developed with the purpose of extracting and registering measurements from some sensors of the device. Once the information is stored it is processed and analyzed in MATLAB, from which the identification of abrupt movements is achieved regardless of the type of activity performed by the victim at the time of the incident. Finally, a desktop application is developed in the same platform, it contains a graphical interface in which is presented the digitalized reconstruction in three dimensions of the trajectory followed by the victim, as well as the geographic location of the exact site where the incident occurred. In the desktop application is also presented other information relevant to the forensic research like the resultant acceleration before and after the occurrence of unusual activity, the date and hour, number of steps taken by the victim and the total distance of displacement.