영지식 증명을 활용한 블록체인 기반 개인정보 관리 기법

As the utilization value of personal information becomes higher, discussions about providing personal information arebeing conducted actively. One of the most common methods of providing personal information is that a group obtains apersonal information with a consent of individual. However, the above method has 2 problems. First, more information isexposed than the information required by organization for utilization of personal information. Second, trusted party shouldprovide organization with an authentication of personal information whenever they require personal information. To solvethese problems, we propose a personal information management system with blockchain using zk-SNARK(zero-knowledge Succinct Non-interactive ARgument of Knowledge) for privacy. Our proposal enables individuals to guarantee reliability oftheir information and protect their privacy concurrently using zk-SNARK when they provid organization with their personalinformation. In addition, it is possible to manage the personal information data while ensuring the integrity of the data usingblockchain and it is possible to share the personal information more conveniently than existing systems.