Open AccessAudio Forensics on Smartphone with Digital Forensics Research Workshop (DFRWS) Method
Author(s) -
Sunardi Sunardi,
Imam Riadi,
Rusydi Umar,
Muhammad Fauzan Gustafi
Publication year - 2021
Publication title -
commit (communication and information technology) journal/commit journal
Language(s) - English
Resource type - Journals
eISSN - 2460-7010
pISSN - 1979-2484
DOI - 10.21512/commit.v15i1.6739
Subject(s) - spectrogram , computer science , digital audio , digital forensics , computer forensics , hash function , speech recognition , multimedia , information retrieval , audio signal , computer security , speech coding
Audio is one of the digital items that can reveal a happened case. However, audio evidence can also be manipulated and changed to hide information. Forensics audio is a technique to identify the sound’s owner from the audio using pitch, formant, and spectrogram parameters. The conducted research examines the similarity of the original sound with the manipulated voice to determine the owner of the sound. It analyzes the level of similarity or identical sound using spectrogram analysis with the Digital Forensics Research Workshop (DFRWS) Method. The research objects are original and manipulated files. Both files are in mp3 format, which is encoded to WAV format. Then, the live forensics method is used by picking up the data on a smartphone. Several applications are also used. The results show that the research successfully gets digital evidence on a smartphone with the Oxygen Forensic application. It extracts digital evidence in the form of two audio files and two video files. Then, by the hashing process, the four obtained files are proven to be authentic. Around 90% of the data are identical to the original voice recording. Only 10% of the data are not identical.