Off-Line Keyword Guessing Attacks on Searchable Encryption with Keyword-Recoverability

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  • YOON Eun-Jun
    School of Electrical Engineering and Computer Science, Kyungpook National University
  • YOO Kee-Young
    School of Electrical Engineering and Computer Science, Kyungpook National University

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In 2009, Jeong et al. proposed a new searchable encryption scheme with keyword-recoverability which is secure even if the adversaries have any useful partial information about the keyword. They also proposed an extension scheme for multi-keywords. However, this paper demonstrates that Jeong et al.'s schemes are vulnerable to off-line keyword guessing attacks, where an adversary (insider/outsider) can retrieve information of certain keyword from any captured query message of the scheme.

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