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    题名: Somewhat semantic secure public key encryption with filtered-equality-test in the standard model and its extension to searchable encryption
    作者: 左瑞麟
    Huang, Kaibin
    Tso, Ray-Lin
    Chen, Yu Chi
    贡献者: 資科系
    关键词: Public key cryptography;Security of data;Semantic Web;Semantics;Testing;Ciphertexts;Equality tests;Searchable encryptions;Semantic security;Standard model;Cryptography
    日期: 2017-11
    上传时间: 2017-08-31 13:48:24 (UTC+8)
    摘要: Public key encryption with equality test (PKE-ET) is a public key encryption with an extra functionality, so-called 'equality test'. An authorized third party can verify the equivalence between two ciphertexts encrypted under different public keys, while the decryption keeps unavailable. However, the privacy of most existing PKE-ET schemes drop to one-way security owing to the 'equality test' functionality. In this work, we propose a novel architecture called filtered equality test (FET), which 'filtered' denotes only few receiver-selected messages can be equality tested. In such model, we propose an equality test scheme, PKE-FET, which is the first one to be proved (somewhat) semantic secure. The concrete PKE-FET scheme and its rigorous security proof in the standard model are proposed. Furthermore, FET is also applied to construct a searchable encryption named PE-MKS, which is inherently proved semantic secure (so called the indistinguishability against chosen keyword attacks) in the standard model.
    關聯: Journal of Computer and System Sciences, 89, 400-409
    数据类型: article
    DOI 連結: http://dx.doi.org/10.1016/j.jcss.2017.06.001
    DOI: 10.1016/j.jcss.2017.06.001
    显示于类别:[資訊科學系] 期刊論文

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