MPSS: Mobile Proactive Secret Sharing

David A. Schultz, B. Liskov, Moses D. Liskov
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引用次数: 55

Abstract

This article describes MPSS, a new way to do proactive secret sharing. MPSS provides mobility: The group of nodes holding the shares of the secret can change at each resharing, which is essential in a long-lived system. MPSS additionally allows the number of tolerated faulty shareholders to change when the secret is moved so that the system can tolerate more (or fewer) corruptions; this allows reconfiguration on-the-fly to accommodate changes in the environment. MPSS includes an efficient protocol that is intended to be used in practice. The protocol is optimized for the common case of no or few failures, but degradation when there are more failures is modest. MPSS contains a step in which nodes accuse proposals made by other nodes; we show a novel way to handle these accusations when their verity cannot be known. We also present a way to produce accusations that can be verified without releasing keys of other nodes; verifiable accusations improve the performance of MPSS, and are a useful primitive independent of MPSS.
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移动主动秘密共享
本文介绍了一种实现主动秘密共享的新方法——MPSS。MPSS提供了移动性:持有秘密共享的节点组可以在每次重新共享时更改,这在长寿命系统中是必不可少的。MPSS还允许在秘密转移时改变可容忍的错误股东的数量,以便系统可以容忍更多(或更少)的腐败;这允许动态重新配置以适应环境的变化。MPSS包含了一种旨在用于实际的高效协议。该协议针对没有故障或很少故障的常见情况进行了优化,但是当有更多故障时,降级是适度的。MPSS包含一个步骤,其中节点指责其他节点提出的建议;我们展示了一种新颖的方式来处理这些指控,当他们的真实性无法得知。我们还提出了一种可以在不释放其他节点密钥的情况下产生可验证的指控的方法;可验证的指控提高了MPSS的性能,并且是独立于MPSS的有用原语。
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来源期刊
ACM Transactions on Information and System Security
ACM Transactions on Information and System Security 工程技术-计算机:信息系统
CiteScore
4.50
自引率
0.00%
发文量
0
审稿时长
3.3 months
期刊介绍: ISSEC is a scholarly, scientific journal that publishes original research papers in all areas of information and system security, including technologies, systems, applications, and policies.
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