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Searchable Encryption with Keyword-Recoverability

Authors
Jeong, Ik RaeKwon, Jeong OkHong, DowonLee, Dong Hoon
Issue Date
May-2009
Publisher
IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
Keywords
keyword search; keyword-testability; keyword-recoverability; data-recoverability; chosen ciphertext attacks
Citation
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, v.E92D, no.5, pp.1200 - 1203
Indexed
SCIE
SCOPUS
Journal Title
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS
Volume
E92D
Number
5
Start Page
1200
End Page
1203
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/120091
DOI
10.1587/transinf.E92.D.1200
ISSN
0916-8532
Abstract
Searchable encryption has many applications including e-mail systems and storage systems. The usefulness of searchable encryption derives from its support of keyword-testability. Keyword-testability means that a receiver of a ciphertext can test whether the ciphertext contains a specific keyword. Recently, Bellare et al. suggested an efficiently-searchable encryption scheme with keyword-recoverability as well as keyword-testability. Keyword-recoverability means that a receiver can extract the keyword from a ciphertext. All of the previous searchable encryption schemes have provided only keyword-testability. However, as explained by Bellare et al., no efficiently-search able encryption scheme can provide even security against chosen keyword attacks. That is, Bellare et al.'s scheme assumes that no useful partial information about the keyword is known to the adversaries. In this paper, we suggest an SEKR (searchable encryption with keyword-recoverability) scheme which is secure even if the adversaries have any useful partial information about the keyword. Our scheme provides security against chosen ciphertext attacks which are stronger attacks than chosen keyword attacks. We also suggest an SEKR scheme for multi-keywords.
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