![]() ![]() ![]() For instance, information sharing endeavors can support the scientific discovery process, enable governments to assess and refine policies, and enhance intelligence and national security. THERE is ample evidence to show that sharing information has great benefits to society across a wide range of sectors and applications. To address such limitations, this paper introduces the necessary techniques to build Lucene-P 2 that allows one party to discover whether a second party harbors any relevant textual information without either party disclosing any information. Over the past decade, various approaches, generally referred to as private information retrieval, have been proposed to obfuscate queries and responses, but they are limited in that the retrieved information is inadequate to compute relevancy. Similarly, when a private database contains sensitive information needed by the user, it cannot be searched freely. For example, submitting a query to a publicly available search engine (e.g., Bing or Google) requires disclosing potentially delicate facts (e.g., thoughts about abortion), as well as the websites the user considers interesting. However, currently deployed IR technologies, e.g., Apache Lucene - open-source search software, are insufficient when the information is protected or deemed to be private. Information retrieval (IR) plays an essential role in daily life.
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