【Author】
Biswas, Anindya Kumar; Dasgupta, Mou; Ray, Sangram; Khan, Muhammad Khurram
【Source】COMPUTERS & ELECTRICAL ENGINEERING
【Abstract】A cheating-free (t, n) threshold secret sharing scheme using Blockchain is presented, where Shamir's technique is followed and the Blockchain vulnerabilities due to PoW/PoS (Proof-ofWork/Stake) consensus, are removed. We address the shares' cheating issues and design a Blockchain based SS scheme, in which the participants' shares are recorded secretly in a block and the dealer's identity along with other parameters are made visible through the genesis block. Our scheme uses a short-length Blockchain comprising 2 blocks per secret negotiation session. The main objectives are to improve Shamir's secret sharing scheme with Blockchain such that the cheating activities from dealer and/or participants become infeasible, and to enhance Blockchain technology with a consensus mechanism using Blockchain based SS scheme such that insecurity of PoW/PoS consensus are avoidable. The security and performance analysis of the scheme are provided. Although Blockchain increases some overheads, it makes a complete cheating-free SS scheme.
【Keywords】Secret sharing scheme; Lagrange polynomial interpolation; Blockchain technology; PoW and PoS consensus; Threshold cryptography; Key Management
【标题】具有增强区块链的可能无作弊 (t, n) 阈值秘密共享方案
【摘要】提出了一种使用区块链的无作弊（t，n）阈值秘密共享方案，该方案遵循 Shamir 的技术，并消除了由于 PoW/PoS（Proof-ofWork/Stake）共识导致的区块链漏洞。我们解决了股份的作弊问题并设计了一个基于区块链的 SS 方案，其中参与者的股份被秘密记录在一个区块中，并且交易商的身份以及其他参数通过创世区块可见。我们的方案使用一个短长度的区块链，每个秘密协商会话包含 2 个块。主要目标是改进 Shamir 与区块链的秘密共享方案，使来自经销商和/或参与者的作弊活动变得不可行，并通过使用基于区块链的 SS 方案的共识机制来增强区块链技术，从而避免 PoW/PoS 共识的不安全性.提供了该方案的安全性和性能分析。虽然区块链增加了一些开销，但它是一个完整的无作弊的 SS 方案。
【关键词】秘密分享方案；拉格朗日多项式插值；区块链技术； PoW 和 PoS 共识；阈值密码学；密钥管理
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