带有离线恢复方的阈值ECDSA
Threshold ECDSA with an Offline Recovery Party
AI总结：
本文提出一种支持离线参与者的阈值ECDSA签名协议，通过通信协议替代传统签名流程，保持验证算法一致性，且不依赖可信第三方。
摘要：
(t,n)-阈值签名方案允许n个参与者进行分布式签名，使得任何大小为t的子组可以签名，而任何人数更少的组则不能。我们的目标是产生与现有集中签名方案兼容的签名：密钥生成和签名算法被替换为参与者之间的通信协议，但验证算法保持与使用集中算法生成的签名相同。从R.Gennaro和S.Goldfeder的ECDSA阈值方案出发，我们提出了第一个支持在密钥生成阶段有离线参与者的多方签名协议，且不依赖于可信第三方。按照已确立的方法，我们证明我们的方案能够抵御适应性恶意对手。
英文摘要：
A $(t,n)-$ threshold signature scheme enables distributed signing among $n$ players such that any subgroup of size $t$ can sign, whereas any group with fewer players cannot. Our goal is to produce signatures that are compatible with an existing centralized signature scheme: the key generation and signature algorithm are replaced by a communication protocol between the parties, but the verification algorithm remains identical to that of a signature issued using the centralized algorithm. Starting from the threshold schemes for the ECDSA signature due to R. Gennaro and S. Goldfeder, we present the first protocol that supports multiparty signatures with an offline participant during the Key Generation Phase, without relying on a trusted third party. Following well-established approaches, we prove our scheme secure against adaptive malicious adversaries.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
