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Conference Paper Open Access

Deleted Audio File Decay on a Digital Voice Recorder

Authors: Jones, James

AES Conference: 2017 AES International Conference on Audio Forensics · Paper 1-7 · June 2017

Abstract

Recovery of intact but previously deleted digital files is a staple of data recovery services and digital forensics investigations. Although more challenging, the recovery and analysis of fragments from deleted files remains an active area of research and application. In this work, we study the decay of MP3 formatted audio files on a portable voice recorder with internal flash storage, and we recover usable audio fragments. Our approach captures media snapshots over time, then analyzes them to measure deleted file decay. Our results in this work and elsewhere indicate that fragments of deleted files are (a) surprisingly persistent, (b) recoverable, and (c) interpretable. This work is relevant for law enforcement, the intelligence community, and data recovery specialists.

Details

Published in

AES Conference: 2017 AES International Conference on Audio Forensics

Paper number

1-7

Publication date

June 6, 2017

Session subject

Authentication

Affiliation

George Mason University, Fairfax, VA, USA (See document for exact affiliation information.)

Type

Conference Paper

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Cite this paper

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• CSE
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J. Jones, “Deleted Audio File Decay on a Digital Voice Recorder,” in Proc. AES Conference: 2017 AES International Conference on Audio Forensics, Jun. 2017, Paper 1-7. [Online]. Available: https://aes.org/publications/elibrary-page/?id=18742

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Jones J. Deleted Audio File Decay on a Digital Voice Recorder. In: AES Conference: 2017 AES International Conference on Audio Forensics. Audio Engineering Society; 2017. Paper 1-7. Available from: https://aes.org/publications/elibrary-page/?id=18742

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@inproceedings{Jones2017_18742,
  author = {Jones, James},
  title = {{Deleted Audio File Decay on a Digital Voice Recorder}},
  booktitle = {AES Conference: 2017 AES International Conference on Audio Forensics},
  note = {Paper 1-7},
  year = {2017},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=18742}
}

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TY  - CPAPER
TI  - Deleted Audio File Decay on a Digital Voice Recorder
AU  - Jones, James
T2  - AES Conference: 2017 AES International Conference on Audio Forensics
SP  - 1
EP  - Array
M1  - Paper 1-7
PY  - 2017
DA  - 2017/06/06
UR  - https://aes.org/publications/elibrary-page/?id=18742
PB  - Audio Engineering Society
LA  - en
AB  - Recovery of intact but previously deleted digital files is a staple of data recovery services and digital forensics investigations. Although more challenging, the recovery and analysis of fragments from deleted files remains an active area of research and application. In this work, we study the decay of MP3 formatted audio files on a portable voice recorder with internal flash storage, and we recover usable audio fragments. Our approach captures media snapshots over time, then analyzes them to measure deleted file decay. Our results in this work and elsewhere indicate that fragments of deleted files are (a) surprisingly persistent, (b) recoverable, and (c) interpretable. This work is relevant for law enforcement, the intelligence community, and data recovery specialists.
ER  - 

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