Gyeong-Jin Ra1, Chang-Hyun Roh1, Im-Yeong Lee1, *
CMC-Computers, Materials & Continua, Vol.65, No.1, pp. 153-170, 2020, DOI:10.32604/cmc.2020.011293
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… More >
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