Timed-Release Computational Secret Sharing Scheme and Its Applications

Timed-Release Computational Secret Sharing Scheme and Its Applications
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定时发布计算秘密共享方案及其应用

DOI:
10.1007/978-3-319-12475-9_24
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发表时间:
2014
期刊:
Provable Security
影响因子:
--
通讯作者:
Yohei Watanabe and Junji Shikata
Yohei Watanabe and Junji Shikata
中科院分区:
--
文献类型:
--
作者:
富田信一朗;渡邉洋平;四方順司;Yohei Watanabe and Junji Shikata

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秘密共享方案是一种重要的密码体制。本文研究了一种实用、简单、具有定时发布功能的计算秘密共享方案,称为定时发布计算秘密共享方案。在tr-css中,大于或等于门限数的参与者只有在交易者指定的时间到来时,才能使用他们的份额来重构秘密。我们的tr-css可以看作是Krawczyk的css的自然扩展,我们最终以很小的开销成功地为krawczyk的css添加了定时发布功能,这似乎是最优的。此外,我们还证明了我们提出的tr-css方案对于以通用和高效的方式构造门限加密和具有定时释放功能的多重加密具有重要意义。
A secret sharing scheme is an important cryptographic primitive. In this paper, we focus on a computational secret sharing (CSS) scheme, which is a practical, simple secret sharing scheme, with timed-release functionality, which we call a timed-release computational secret sharing (TR-CSS) scheme. In TR-CSS, participants more than or equal to a threshold number can reconstruct a secret by using their shares only when the time specified by a dealer has come. Our TR-CSS can be regarded as a natural extension of Krawczyk’s CSS, and we finally succeed to add timed-release functionality to Krawczyk’s CSS with small overhead, which seems to be almost optimal. Moreover, we show our proposal of TR-CSS is important for constructing threshold encryption and multiple encryption with timed-release functionality in a generic and efficient way.
DOI: 10.1145/359168.359176
发表时间: 1979-01-01
影响因子: 22.7
作者:
SHAMIR, A
通讯作者: SHAMIR, A
具有信息论安全性的定时发布秘密共享方案
DOI: --
发表时间: 2015
期刊: Springer LNCS
影响因子: --
作者:
Yohei Watanabe;Junji Shikata
通讯作者: Junji Shikata