Every crime can leave evidence therefore after erasing the track, it can be revealed through digital forensic investigations on the smartphone devices that are used as objects to find digital evidence. Perpetrators communicate and send pornographic content in the shape of conversations, audio, and video, then delete them to eliminate traces. This study conducts a forensic investigation on a crime simulation in pornographic content distribution using Facebook Messenger as a communication medium on Android smartphones.

Besides being used for positive purposes, this technology can also be used to carry out harmful activities. Facebook Messenger is an instant messenger that contains multi-platform for sending text, image, sound, and video messages. Technological developments make it easier for people to communicate and share information. The results of this research can be used as a reference for other forensic researchers/experts in handling similar crime cases on the Signal Messenger application to get better results. The results of this research indicate that Belkasoft Evidence Center forensic tool is better, with an accuracy rate of 78.69%, while Magnet AXIOM is 26.23% and MOBILedit Forensic Express is 9.84%. Digital evidence is found from the Signal Messenger application: application information, account information, chat, pictures, videos, contacts, and stickers. The research was carried out according to the case scenario with 11 predetermined parameters. This research uses Belkasoft, Magnet AXIOM, and MOBILedit Forensic Express tools and implements the Digital Forensics Research Workshop (DFRWS) framework in each stage of the research experiment. This research aims to find digital evidence on Signal Messenger application installed on the perpetrator's Android smartphone. Signal Messenger is one of the social media that has become a trending topic since the number of personal data security issues and the emergence of end-to-end encryption features. One of the cybercrimes that occured during the COVID-19 pandemic was the spread hoaxes about the COVID-19 vaccine which caused panic in society. Cybercrime is a crime committed using equipment connected to the internet.

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