The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Blockchain-Based Smart Home System for Access Latency and Security

지연시간 및 보안을 위한 블록체인 기반 스마트홈 시스템 설계

  • 아창위 (전남대학교 대학원 컴퓨터공학과) ;
  • 김강철 (전남대학교 공학대학 전기컴퓨터공학부)
  • Received : 2022.11.23
  • Accepted : 2023.02.17
  • Published : 2023.02.28
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Abstract

In modern society, smart home has become a part of people's daily life. But traditional smart home systems often have problems such as security, data centralization and easy tampering, so a blockchain is an emerging technology that solves the problems. This paper proposes a blockchain-based smart home system which consists in a home and a blockchain network part. The blockchain network with 8 nodes is implemented by HyperLeger Fabric platform on Docker. ECC(Elliptic Curve Cryptography) technology is used for data transmission security and RBAC(role-based access control) manages the certificates of network members. Raft consensus algorithm maintains data consistency across all nodes in a distributed system and reduces block generation time. The query and data submission are controlled by the smart contract which allows nodes to safely and efficiently access smart home data. The experimental results show that the proposed system maintains a stable average query and submit time of 84.5 [ms] and 93.67 [ms] under high concurrent accesses, respectively and the transmission data is secured through simulated packet capture attacks.

현대 사회에서 스마트홈은 사람들의 일상생활의 한 부분이 되고 있다. 전통적인 스마트홈 시스템은 보안, 데이터 집중화, 위변조 같은 문제들을 내포하고 있으며, 이러한 문제들을 해결하는 기술로서 블록체인이 각광 받고 있다. 본 논문은 홈과 블록체인 네트워크 부분으로 구성된 블록체인 기반 스마트홈 시스템을 제안한다. 8개의 노드로 구성된 블록체인 네트워크는 도커 환경에서 하이퍼레저 패브릭 플랫폼에서 구현된다. 데이터 전송 보안을 위하여 ECC 암호화 기술이 사용되고, RBAC가 네트워크 회원의 인증을 관리한다. Raft 의사 결정 알고리즘은 분산처리 시스템의 모든 노드에서 데이터 일관성을 유지하고, 블록 발생 시간을 줄인다. 노드들이 스마트홈 데이터를 안전하고 효율적으로 접근하도록 스마트 컨트랙트가 쿼리와 데이터 전송을 제어한다. 실험 결과는 많은 동시 접근 하에서 안전한 평균 쿼리와 서브밋 시간이 84.5 [ms]와 93.67 [ms]로 유지되고, 모의 패킷캡쳐 공격에서 전송 데이터가 안전하다는 것을 보여준다.

Keywords

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