김재현, 김성환, 양성민, 이용학,

Vol. 34, No. 6, pp. 1345-1357, 12월. 2024
10.13089/JKIISC.2024.34.6.1345, Full Text:
Keywords: Blockchain, Smart Contracts, InterPlanetary File System, SoulBound Token, Layer2 Solution
Abstract

This paper proposes a method to enhance information security by storing data in SoulBound Token instead of storing sensitive personal information, such as body measurements, in centralized data storage systems in text format. Sensitive information is stored using the InterPlanetary File System method, and the corresponding Content Identifier is linked to the SBT, avoiding direct storage in a database. Access to the SBT is restricted to pre-approved accounts, allowing startups handling sensitive information to securely use the data. Through experiments, it was confirmed that access was impossible from unauthorized accounts, and the owner was able to grant and revoke access permissions as needed. Furthermore, the paper summarizes the advantages and disadvantages of various Layer 2 solutions to consider when issuing SBTs, proposing a method to enhance transaction processing speed and generate SBTs at a gas fee rate approximately 1/4300th of the mainnet.

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