An ElGamal-like Secure Channel Free Public Key Encryption with Keyword Search Scheme

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Title:	An ElGamal-like Secure Channel Free Public Key Encryption with Keyword Search Scheme
Authors:	Min-Shiang Hwang;Cheng-Chi Lee;Shih-Ting Hsu
Contributors:	資訊工程學系
Date:	2019-03
Issue Date:	2019-11-08 02:37:21 (UTC+0)
Abstract:	The idea of public key encryption with keyword search (PEKS), proposed by Boneh et al., enables one to send a trapdoor containing a encrypted keyword to query data without revealing the keyword. In Boneh et al.’s design, the trapdoor has to be transferred through a secure channel, which is both costly and inefficient. Baek et al. then proposed an efficient secure channel free public key encryption scheme with keyword search (SCF-PEKS). After that, vast amounts of research have focused on the protection against the off-line keyword guessing attack (OKGA) by enhancing the model. However, most of the PEKS/SCF-PEKS schemes developed so far are constructed by applying bilinear pairing and are susceptible to off-line keyword guessing attacks. In this paper, we propose a new SCF-PEKS scheme based on the ElGamal cryptosystem. The proposed scheme is not only secure against off-line keyword guessing attacks but also improves the efficiency.
Relation:	INTERNATIONAL JOURNAL OF FOUNDATIONS OF COMPUTER SCIENCE
Appears in Collections:	[Department of Computer Science and Information Engineering] Journal Artical

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