Proof-of-Stake Protocols for Privacy-Aware Blockchains
Proof-of-Stake Protocols for Privacy-Aware Blockchains
复制标题
隐私意识区块链的权益证明协议
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Daniel Tschudi
中科院分区：
文献类型：
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作者：
C. Ganesh;Claudio Orlandi;Daniel Tschudi
权益证明（PoS）协议正在成为区块链（或分布式账本）中达成共识的浪费工作量证明（PoW）协议的最有前途的替代方案之一。然而，目前的PoS协议本质上会披露利益相关者的身份和财富，因此似乎与保护隐私的加密货币（如ZCash，Monero等）不兼容。本文对具有隐私特性的PoS协议进行了形式化研究。我们的成果包括：
1.
一个（理论上的）可行性结果表明，有可能构建一个一般类的私人PoS（PPoS）协议;并将隐私添加到一个广泛类的PoS协议，
2.
流行PoS协议Ouroboros Praos的隐私保护版本。
Proof-of-stake (PoS) protocols are emerging as one of the most promising alternative to the wasteful proof-of-work (PoW) protocols for consensus in Blockchains (or distributed ledgers). However, current PoS protocols inherently disclose both the identity and the wealth of the stakeholders, and thus seem incompatible with privacy-preserving cryptocurrencies (such as ZCash, Monero, etc.). In this paper we initiate the formal study for PoS protocols with privacy properties. Our results include:
1.
A (theoretical) feasibility result showing that it is possible to construct a general class of private PoS (PPoS) protocols; and to add privacy to a wide class of PoS protocols,
2.
A privacy-preserving version of a popular PoS protocol, Ouroboros Praos.