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The model of public key encryption with keyword search (PEKS) proposed by Boneh et al. enables one to search encrypted keywords without revealing any information on the data. Baek et al. proposed an enhanced model called secure channel-free PEKS (SCF-PEKS) to removes the costly secure channel. However, most of the presented SCF-PEKS schemes were proved secure in the random oracle model. In 2009, Fang...
The notion of Public Key Encryption with Keyword Search (PEKS), which enables one to search encrypted data in public key setting, was firstly suggested by Boneh et al. in 2004. So far most of presented PEKS schemes were constructed based on bilinear pairing. However, PEKS schemes based on pairing are susceptible to off-line keyword guessing attacks. In ICCSA 2006, Khader proposed a PEKS scheme not...
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