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Safeguarding the evidential value of forensic cryptocurrency investigations
حفاظت از ارزش اثبات تحقیقات ارز رمزنگاری شده قانونی-2020 Analyzing cryptocurrency payment flows has become a key forensic method in law enforcement and is
nowadays used to investigate a wide spectrum of criminal activities. However, despite its widespread
adoption, the evidential value of obtained findings in court is still largely unclear. In this paper, we focus
on the key ingredients of modern cryptocurrency analytics techniques, which are clustering heuristics
and attribution tags. We identify internationally accepted standards and rules for substantiating suspicions
and providing evidence in court and project them onto current cryptocurrency forensics practices.
By providing an empirical analysis of CoinJoin transactions, we illustrate possible sources of misinterpretation
in algorithmic clustering heuristics. Eventually, we derive a set of legal key requirements and
translate them into a technical data sharing framework that fosters compliance with existing legal and
technical standards in the realm of cryptocurrency forensics. Integrating the proposed framework in
modern cryptocurrency analytics tools could allow more efficient and effective investigations, while
safeguarding the evidential value of the analysis and the fundamental rights of affected persons. Keywords: Digital forensics | Cryptocurrencies | Digital evidence | Safeguards | Legal |
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