Open Access
ARTICLE
A Key Recovery System Based on Password-Protected Secret Sharing in a Permissioned Blockchain
Gyeong-Jin Ra1, Chang-Hyun Roh1, Im-Yeong Lee1, *
1 First Soonchunhyang University, Asan-si, 31538, Korea.
* Corresponding Author: Im-Yeong Lee. Email: .
Computers, Materials & Continua 2020, 65(1), 153-170. https://doi.org/10.32604/cmc.2020.011293
Received 30 April 2020; Accepted 08 June 2020; Issue published 23 July 2020
Abstract
In today’s fourth industrial revolution, various blockchain technologies are
being actively researched. A blockchain is a peer-to-peer data-sharing structure lacking
central control. If a user wishes to access stored data, she/he must employ a private key to
prove ownership of the data and create a transaction. If the private key is lost, blockchain
data cannot be accessed. To solve such a problem, public blockchain users can recover
the key using a wallet program. However, key recovery in a permissioned blockchain
(PBC) has been but little studied. The PBC server is Honest-but-Curious (HBC), and
should not be able to learn anything of the user; the server should simply recover and
store the key. The server must also be resistant to malicious attacks. Therefore, key
recovery in a PBC must satisfy various security requirements. Here, we present a
password-protected secret sharing (PPSS) key recovery system, protected by a secure
password from a malicious key storage server of a PBC. We describe existing key
recovery schemes and our PPSS scheme.
Keywords
Cite This Article
G. Ra, C. Roh and I. Lee, "A key recovery system based on password-protected secret sharing in a permissioned blockchain,"
Computers, Materials & Continua, vol. 65, no.1, pp. 153–170, 2020. https://doi.org/10.32604/cmc.2020.011293
Citations