https://scholars.lib.ntu.edu.tw/handle/123456789/550613
標題: | An oracle-based on-chain privacy | 作者: | Chen, Y.-J. Hsieh, Y.-C. CHIH-WEN HSUEH JA-LING WU |
關鍵字: | Blockchain; Homomorphic encryption; Privacy; Smart contract | 公開日期: | 2020 | 卷: | 9 | 期: | 3 | 起(迄)頁: | 1��15�� | 來源出版物: | Computers | 摘要: | In this work, we demonstrate how the blockchain and the off-chain storage interact via Oracle-based mechanisms, which build an effective connection between a distributed database and real assets. For demonstration purposes, smart contracts were drawn up to deal with two different applications. Due to the characteristics of the blockchain, we may still encounter severe privacy issues, since the data stored on the blockchain are exposed to the public. The proposed scheme provides a general solution for resolving the above-mentioned privacy issue; that is, we try to protect the on-chain privacy of the sensitive data by using homomorphic encryption techniques. Specifically, we constructed a secure comparison protocol that can check the correctness of a logic function directly in the encrypted domain. By using the proposed access control contract and the secure comparison protocol, one can carry out sensitive data-dependent smart contract operations without revealing the data themselves. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85093902489&partnerID=40&md5=e48f45dfaf966a2f12f591b74aa01c1e https://scholars.lib.ntu.edu.tw/handle/123456789/550613 |
DOI: | 10.3390/computers9030069 |
顯示於: | 資訊工程學系 |
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