Lelantus: Towards Confidentiality and Anonymity of Blockchain Transactions from Standard Assumptions
Lelantus: Towards Confidentiality and Anonymity of Blockchain Transactions from Standard Assumptions
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Lelantus：从标准假设走向区块链交易的保密性和匿名性
DOI：
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发表时间：
2019
期刊：
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通讯作者：
Aram Jivanyan
中科院分区：
文献类型：
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作者：
Aram Jivanyan
我们提出了Lelantus，一个新的匿名支付系统，它可以确保交易的机密性和匿名性，具有小的证明大小，短的验证时间，而不需要可信的设置。受Zerocoin协议的启发，Lelantus扩展了原有的Zerocoin功能，以支持机密交易，同时还显着提高了协议性能。Lelantus的证明尺寸几乎是原始Zerocoin证明尺寸的17倍。此外，我们展示了如何支持有效的聚合的交易证明，使证明验证，而渐近线性的，是非常有效的，在实践中。Lelantus建立在保密交易，Zerocoin和One-out-of-Many证明的技术基础上，其效率特别适合于在使用经过充分研究的加密假设的同时，以最小的信任实现私有区块链交易。
We propose Lelantus, a new anonymous payment system which ensures both transaction confidentiality and anonymity with small proof sizes, short verification times and without requiring a trusted setup. Inspired by the Zerocoin protocol, Lelantus extends the original Zerocoin functionality to support confidential transactions while also significantly improving on the protocol performance. Lelantus proof sizes are almost 17 times smaller compared to the original Zerocoin proof sizes. Moreover, we show how to support efficient aggregation of the transaction proofs, so that the proof verification, while asymptotically linear, is very efficient in practice. Lelantus builds on the techniques of Confidential Transactions, Zerocoin and Oneout-of-Many proofs and its efficiency is particularly well-suited for enabling private blockchain transactions with minimal trust required while employing well-studied cryptographic assumptions.