Key Backup and Recovery for Resilient DID Environment

Jihwan Kim, Pyung Kim, Younho Lee () and Daeseon Choi ()
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Jihwan Kim: Graduate School of IT and Policy, SeoulTech, Seoul 01811, Republic of Korea
Pyung Kim: Department of Computer Science, Inje University, Gimhae 50834, Republic of Korea
Younho Lee: Department of Industrial Engineering, SeoulTech, Seoul 01811, Republic of Korea
Daeseon Choi: Department of Software, Soong-Sil University, Seoul 07027, Republic of Korea

Mathematics, 2024, vol. 12, issue 6, 1-15

Abstract: This paper delves into the advantages of authentication algorithms employing self-sovereign identity, highlighting a reduced communication overhead and the elimination of single points of failure. However, it acknowledges the vulnerability of digital wallets to real-world issues like loss or theft. To address these challenges, we propose an efficient key backup and recovery protocol based on the FROST threshold signature algorithm. This protocol involves trusted third parties and backup devices, ensuring secure secret key sharing and rapid key recovery. Performance evaluations, including key recovery time, demonstrate the protocol’s efficiency and reliability, bolstering the overall robustness of self-sovereign identity systems.

Keywords: FROST (flexible round-optimized Schnorr threshold signatures); interoperability technology of digital identification; multi-party distributed signature; universal digital wallet; key backup; key recovery (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2024
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