Although the blockchain technology has been developed mainly around bitcoin, it is also being studied for use in various fields. As a result, it is spreading not only to the applications of settlement and transaction utilizing the characteristics of bitcoin (virtual money) but also to the fields not directly related to money. In this paper, we propose a personal portfolio multilateral authentication system that guarantees the reliability and integrity of data by using the features of blockchain technology on a distributed network. The proposed system could be submitted learning data to a peer in a distributed network by a learner. Then, it is verified through an agreement between peers and recorded in a chronologically encrypted ledger. It is a system that provides learners' information in a safe and prompt manner between schools, the school to the certification authority, the school to the company, and the student to the company according to decisions of learners.
Driven by the development of information and communication technology (ICT) along with the social consciousness of civil societies, a cultural practice of donation using ICT resources is emerging. However, owing to problems with the trust and transparency of donation systems and public revelations of corruption on the part of some groups accepting donations, the donation participation rate is gradually decreasing. Because social welfare is considered a problem that cannot be solved only by the state, the operation of sound social welfare organizations that individuals can consistently trust and donate to is necessary. In this study, we propose a personal donation system designed to help ensure transparency in the operation of groups accepting donations and to encourage personal donations. To this end, we review the main factors in participant decisions to donate and make continuous donations. The proposed system and detailed module were designed based on a consortium blockchain and implemented by configuring the blockchain channel. We aim to provide a meaningful solution to important social problems using ICT and blockchain technology.
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