Verifiable Timed Signatures Made Practical
Verifiable Timed Signatures Made Practical
复制标题
可验证的定时签名变得实用
DOI:
10.1145/3372297.3417263
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Schröder, Dominique
中科院分区:
文献类型:
--
作者:
Thyagarajan, Sri Aravinda;Bhat, Adithya;Malavolta, Giulio;Döttling, Nico;Kate, Aniket;Schröder, Dominique
A verifiable timed signature (VTS) scheme allows one to time-lock a signature on a known message for a given amount of time T such that after performing a sequential computation for time T anyone can extract the signature from the time-lock. Verifiability ensures that anyone can publicly check if a time-lock contains a valid signature on the message without solving it first, and that the signature can be obtained by solving the same for time T.This work formalizes VTS, presents efficient constructions compatible with BLS, Schnorr, and ECDSA signatures, and experimentally demonstrates that these constructions can be employed in practice. On a technical level, we design an efficient cut-and-choose protocol based on the homomorphic time-lock puzzles to prove the validity of a signature encapsulated in a time-lock puzzle. We also present a new efficient range proof protocol that significantly improves upon existing proposals in terms of the proof size, and is also of independent interest.While VTS is a versatile tool with numerous existing applications, we demonstrate VTS's applicability to resolve three novel challenging issues in the space of cryptocurrencies. Specifically,we show how VTS is the cryptographic cornerstone to construct:(i) Payment channel networks with improved on-chain unlinkability of users involved in a transaction, (ii) multi-party signing of transactions for cryptocurrencies without any on-chain notion oftime and (iii) cryptocurrency-enabled fair multi-party computation protocol.
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DOI:
--
发表时间:
2018
期刊:
IACR Cryptology ePrint Archive
影响因子:
--
作者:
T. Frederiksen;Yehuda Lindell;Valery Osheter;Benny Pinkas
通讯作者:
Benny Pinkas
影响因子:
22.7
作者:
SHAMIR, A
通讯作者:
SHAMIR, A
DOI:
10.1007/978-3-030-26948-7_22
发表时间:
2019
期刊:
影响因子:
--
作者:
Giulio Malavolta;Sri Aravinda Krishnan Thyagarajan
通讯作者:
Sri Aravinda Krishnan Thyagarajan
DOI:
10.14722/ndss.2019.23330
发表时间:
2019
期刊:
Proceedings 2019 Network and Distributed System Security Symposium
影响因子:
--
作者:
Giulio Malavolta;Pedro A. Moreno-Sánchez;Clara Schneidewind;Aniket Kate;Matteo Maffei
通讯作者:
Giulio Malavolta;Pedro A. Moreno-Sánchez;Clara Schneidewind;Aniket Kate;Matteo Maffei