Crime Evidence Over Blockchain

Abstract

Blockchain is a digital ledger of transactions that is duplicated and spread over the whole network of computer systems on the blockchain, and it is a system of preserving information in a way that makes it difficult or impossible to edit or hack. Collecting, identifying, evaluating, analyzing, preserving, and presenting evidence is a difficult task in existing forensics. That's where the blockchain'sdecentralized nature comes into play, with forensic data being stored in the private network using the blockchain's nodes in a peer-to-peer network. Digitalforensics will also be more secure,and the investigation will be more transparent to those on the other side of the jurisdictional border. In the criminal investigation process, information that frequently changes is stored in the hotblockchain, and unchanging data such as videos are stored in the cold blockchain. In this we are using the Ethereum concepts and implementing smart contracts. Keywords - ledger, chain of custody, Hyperledger fabric, forensic.