블록체인을 활용한 디지털 증거의 무결성 강화 방안 연구

Abstract

Today, development of Internet industry is resulting in rapid increase in utilization of digital devices and the ones secured from crime scenes are increasingly chosen as important evidences. In particular, amendments of criminal procedure act acknowledging admissibility of digital evidences such as emails and computer files passed the assembly plenary session on May 19, 2016. In the future, digital evidences are expected to play important roles in judging suspicions of not only cyber crimes but also all crimes. That is why proving integrity of the digital evidences secured through search and confiscation, that they have not been tampered with in the process of collection, analysis and submission, is expected to become very important. However, advanced research to ensure integrity of digital evidences by blocking them from tampering has been inadequate so far. Thus, this study suggests ways to reinforce integrity of digital evidences using blockchain. Utilizing suggested blockchain technique will enable us to ensure integrity of digital evidences more strongly while maintaining relatively higher performance than that provided by advanced research in terms of potential tampering of digital evidences, system hacking risk and operation cost.