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首页> 外文会议>European Symposium on Research in Computer Security(ESORICS 2004); 20040913-15; Sophia Antipolis(FR) >Signature Bouquets: Immutability for Aggregated/Condensed Signatures
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Signature Bouquets: Immutability for Aggregated/Condensed Signatures

机译：签名花束：聚集/压缩签名的不变性

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摘要

Database outsourcing is a popular industry trend which involves organizations delegating their data management needs to an externai service provider. Since a service provider is almost never fully trusted, security and privacy of outsourced data are important concerns. This paper focuses on integrity and authenticity issues in outsourced databases. Whenever someone queries a hosted database, the returned results must be demonstrably authentic: the querier needs to establish - in an efficient manner - that both integrity and authenticity (with respect to the actual data owner) are assured. To this end, some recent work examined two relevant signature schemes: a condensed variant of batch RSA and an aggregated signature scheme based on bilinear maps In this paper, we introduce the notion of immutability for aggregated signature schemes. Immutability refers to the difficulty of computing new valid aggregated signatures from a set of other aggregated signatures. This is an important feature, particularly for outsourced databases, since lack thereof enables a frequent querier to eventually amass enough aggregated signatures to answer other (un-posed) queries, thus becoming a de jacto service provider. Since prior work does not offer immutability, we propose several practical techniques to achieve it.
机译：数据库外包是一种流行的行业趋势，涉及组织将其数据管理需求委托给外部服务提供商。由于几乎永远不会完全信任服务提供商，因此外包数据的安全性和私密性成为重要问题。本文着重于外包数据库中的完整性和真实性问题。每当有人查询托管数据库时，返回的结果都必须证明是真实的：查询者需要以有效的方式来确保完整性和真实性（相对于实际数据所有者而言）。为此，最近的一些工作检查了两个相关的签名方案：批处理RSA的压缩变体和基于双线性图的聚合签名方案。在本文中，我们介绍了聚合签名方案的不变性的概念。不变性是指难以从一组其他聚合签名中计算出新的有效聚合签名。这是一个重要的功能，特别是对于外包数据库而言，因为它的缺乏使得频繁的查询者最终可以积累足够的聚合签名来回答其他（未摆放的）查询，从而成为事实上的服务提供商。由于先前的工作不能提供不变性，因此我们提出了几种实用的技术来实现这一目标。

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