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Off-Line Keyword Guessing Attacks on Searchable Encryption with Keyword-Recoverability
Eun-Jun YOON Kee-Young YOO
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/07/01
Online ISSN: 1745-1361
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Information Network
keyword search, keyword-recoverability, cryptanalysis, keyword guessing attacks,
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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.