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http://dx.doi.org/10.33778/kcsa.2020.20.4.177

Fair Private Block Encryption Protocol with Proactive Secret Sharing for Delegated Node of Public Blockchain  

Jung, Seung Wook (건양대학교/사이버보안공학과)
Publication Information
Convergence Security Journal / v.20, no.4, 2020 , pp. 177-186 More about this Journal
Abstract
In current public blockchain, any node can see every blocks, so that public blockchain provider transparent property. However, some application requires the confidential information to be stored in the block. Therefore, this paper proposes a multi-layer blockchain that have the public block layer and the private block for confidential information. This paper suggests the requirement for encryption of private block. Also, this paper shows the t-of-n threshold cryptosystem without dealer who is trusted third party. Moreover, the delegated node who has key information can be withdraw the delegated node group or a new delegated node can join in the delegated node group. Therefore, the paper proposes an efficient key information resharing scheme for withdraw and join. Finally proposed scheme satisfies the requirements for encryption and fairness.
Keywords
Blockchain; Private Block; Threshold Cryptosystem; Proactive Secret Sharing;
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