The public key encryption with keyword Search (PEKS) scheme, proposed by Boneh, Di Crescenzo, Ostrovsky and Persiano, enables one to search for encrypted keywords without compromising the security of the original data. Baek et al. noticed that the original notion of PEKS requires the existence of a secure channel, and they further extended this notion by proposing an efficient secure channel fr...

The public key encryption with keyword search (PEKS) provides a way for users to search data which are encrypted under the users’ public key on a storage system. However, the original schemes are based on the unrealistic assumption of a secure channel between the receiver and the server. Baek et al. [1] first proposed a secure channel-free public key encryption with keyword search (SCF-PEKS) to...

Secure keyword search in shared infrastructures prevents stored documents from leaking confidential information to unauthorized users. We assume that a shared index provides confidentiality if it can only be used by users authorized to search all the documents contained in the index. We introduce the Lethe indexing workflow to improve query and update efficiency in secure keyword search. Lethe ...