Blockchain-Based Digital Evidence: Legal Admissibility, Authenticity and Evidentiary Challenges

Abstract

The increasing digitization of social, commercial, and governmental activities has transformed the nature of evidence available in legal proceedings. Blockchain technology, through its distributed architecture, cryptographic verification, and tamper-evident recordkeeping, offers a potential mechanism for improving the authenticity and integrity of digital evidence. However, the technological characteristics of blockchain do not automatically resolve traditional evidentiary questions concerning relevance, reliability, authenticity, attribution, chain of custody, and admissibility. This article examines the potential application of blockchain technology in the preservation and verification of digital evidence. It analyzes the relationship between distributed ledgers, cryptographic hashes, timestamps, digital signatures, and evidentiary principles. Particular attention is given to the distinction between proving that information has remained unchanged and proving that the underlying information is accurate or genuinely attributable to a particular person. The article further examines challenges associated with privacy, blockchain immutability, technical complexity, smart contracts, forensic investigation, and judicial understanding of blockchain-generated records. It proposes a blockchain-enabled evidence framework incorporating secure collection, cryptographic verification, documented chain of custody, identity authentication, independent validation, and judicially understandable technical documentation. The article concludes that blockchain can strengthen evidentiary integrity, but technological immutability should complement rather than replace established legal standards governing admissibility and proof