  The disruptive application of ChatGPT (GPT-3.5, GPT-4) to a variety of
domains has become a topic of much discussion in the scientific community and
society at large. Large Language Models (LLMs), e.g., BERT, Bard, Generative
Pre-trained Transformers (GPTs), LLaMA, etc., have the ability to take
instructions, or prompts, from users and generate answers and solutions based
on very large volumes of text-based training data. This paper assesses the
impact and potential impact of ChatGPT on the field of digital forensics,
specifically looking at its latest pre-trained LLM, GPT-4. A series of
experiments are conducted to assess its capability across several digital
forensic use cases including artefact understanding, evidence searching, code
generation, anomaly detection, incident response, and education. Across these
topics, its strengths and risks are outlined and a number of general
conclusions are drawn. Overall this paper concludes that while there are some
potential low-risk applications of ChatGPT within digital forensics, many are
either unsuitable at present, since the evidence would need to be uploaded to
the service, or they require sufficient knowledge of the topic being asked of
the tool to identify incorrect assumptions, inaccuracies, and mistakes.
However, to an appropriately knowledgeable user, it could act as a useful
supporting tool in some circumstances.
