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비밀공유 기법을 적용한 스마트 컨트랙트 플랫폼에 대한 연구
손애선(Ae-Seon Son),유수빈(Soo-Bin Yoo),조정화(Jung-Hwa Jo),유수민(Su-Min Yoo) 한국정보기술학회 2020 한국정보기술학회논문지 Vol.18 No.11
Smart Contracts are applied to various automation systems that require reliability because of the fact that integrity and validity of data is verified by recording data in a distributed ledger environment, and the characteristics that are automatically executed when conditions set are satisfied by the written code. One of the areas where smart contracts are used is to sign a contract. However, due to the nature of the distributed ledger environment of the Blockchain, there is a problem that data requiring confidentiality cannot be stored because the data that is transacted is shared with all network participants. This paper aims to make it possible to conclude a reliable contract in the process of writing a contract non-face-to-face by applying a method of storing contract contents in off-chain using a secret sharing technique in a contract platform based on smart contracts.
블록체인 기반 탈중앙화 신원증명 환경에서의 계약 플랫폼
조정화(Jung-Hwa Jo),유수빈(Soo-Bin Yoo),유수민(Su-Min Yoo),손애선(Ae-Seon Son) 한국정보기술학회 2020 한국정보기술학회논문지 Vol.18 No.12
Recently, with the development of communication technology and the spread of personal devices, transfer contract technology is being applied to various industrial fields such as finance, insurance, real estate, and labor contracts. As interest in the electronic contract platform grows, the market size continues to grow and the central government and enterprises are investing heavily to improve the existing electronic contract platform. However, the contract system is still operated in a centralized structure, and the contracts are forged or altered by malicious users, and the contracts exchanged online have a problem that the validity of the rights cannot be verified. The platform proposed in this paper reinforces security and transparency based on Blockchain, and concludes a contract in a decentralized identity (DID) environment to verify the users qualifications and identity, and We would like to propose a platform that can prevent forgery or falsification of contracts by malicious users by directly managing them.
자기주권 신원증명 기반 스마트 계약 구현을 위한 자격증명 시스템 제안
유수민(Su-Min Yoo),유수빈(Soo-Bin Yoo),조정화(Jung-Hwa Jo),손애선(Ae-Seon Son) 한국정보기술학회 2020 한국정보기술학회논문지 Vol.18 No.12
Modern society has introduced a public key infrastructure that verifies the proof of data senders while ensuring data leakage on the Internet, providing digital certificate technology based on symmetric and asymmetric key encryption for safe data exchange and identity authentication online. But CAof security is fragile, CA of all users using digital certificates are also vulnerable, and also in a data breach. There is a secondary damage that can be caused by information leaked. In order to prevent damage caused by digital certificates and key leaks, this paper proposes a system to ensure the integrity of data by using the distributed ledger environment, the Block chain, and secure the security to exchange the open key safely in a decentralized structure using the open key of the DID (Decentralized Identifier) Document registered in the block chain.