On information leakage by indexes over data fragments
On information leakage by indexes over data fragments
复制标题
论数据碎片索引的信息泄露
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
P. Samarati
中科院分区：
文献类型：
--
作者：
S. Vimercati;S. Foresti;S. Jajodia;S. Paraboschi;P. Samarati
数据碎片最近已成为加密的补充方法，用于在外部存储数据时保护敏感关联的机密性。在本文中，我们讨论索引（通常与数据的加密部分相关）的使用，虽然可以在查询执行中提供有效性和效率，但与碎片相结合如何可能导致机密（加密或碎片）信息的潜在泄漏。我们说明了泄漏风险如何根据指标类型而变化。这些观察结果对于设计评估信息暴露的方法以及定义碎片数据中的安全（不受推论）索引很有用。
Data fragmentation has recently emerged as a complementary approach to encryption for protecting confidentiality of sensitive associations when storing data at external parties. In this paper, we discuss how the use of indexes, typically associated with the encrypted portion of the data, while desirable for providing effectiveness and efficiency in query execution, can - combined with fragmentation - cause potential leakage of confidential (encrypted or fragmented) information. We illustrate how the exposure to leakage varies depending on the kind of indexes. Such observations can result useful for the design of approaches assessing information exposure and for the definition of safe (free from inferences) indexes in fragmented data.