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Related Experiment Video

Updated: Sep 20, 2025

Fluorescent Paper Strips for the Detection of Diesel Adulteration with Smartphone Read-out
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Digital Forensic Analysis to Improve User Privacy on Android.

Hyungchan Kim1,2, Yeonghun Shin2, Sungbum Kim2

  • 1Platform Tech Team, WINS Co., Ltd., Seongnam 13487, Korea.

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|June 10, 2022
PubMed
Summary
This summary is machine-generated.

Deleted data on Android 9 and 10 smartphones can be recovered, posing privacy risks. Improved security is needed to erase residual data, protecting user information from leakage and identity theft.

Keywords:
Android filesystemAndroid forensicExt4 filesystemdigital forensicpermanent deletionuser privacy

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Area of Science:

  • Computer Science
  • Cybersecurity
  • Data Privacy

Background:

  • Android dominates the smartphone market (85%) and is used in IoT devices.
  • Android devices store sensitive personal and usage data.
  • Inadequate data management and deletion practices create significant cybersecurity threats, including data leakage and identity theft.

Purpose of the Study:

  • To analyze deleted data remnants on Android 9 and 10 devices.
  • To assess the potential for data recovery and associated privacy risks.
  • To identify vulnerabilities in current Android data deletion methods.

Main Methods:

  • Investigated data recovery across three deletion scenarios: app-specific deletion, system cache clearing, and app uninstallation.
  • Focused analysis on Android platforms 9 and 10.
  • Examined residual data in the filesystem's journal and directory entry areas.

Main Results:

  • Demonstrated that deleted data can be recovered from Android 9 and 10 devices.
  • Highlighted potential privacy issues arising from recovered personal data.
  • Identified specific filesystem areas (journal, directory entries) where data persists.

Conclusions:

  • Current data deletion methods on Android 9 and 10 are insufficient to protect user privacy.
  • There is a critical need to enhance Android security by ensuring complete erasure of deleted data.
  • Addressing residual data in filesystem journal and directory areas is crucial for robust user privacy.