Certificateless public-key authenticated encryption with keyword search (CLPAEKS) is first formally proposed by He et al. as combination of the PAEKS and the certificateless public key cryptography (CLPKC). Lin et al. revised He's work and re-formalize the security requirements for CLPAEKS in terms of trapdoor privacy and ciphertext indistinguishability. However, how to achieve both MCI and MTP security in a CLPAEKS scheme is still unknown.
In this paper, we initially propose a CLPAEKS scheme with both MCI security and MTP security simultaneously. We provide formal proof of our schemes in the random oracle model.
Category / Keywords: public-key cryptography / Certificateless Public key encryption, Keyword search, Keyword guessing attacks, Multi-ciphertext indistinguishability, Multi-trapdoor privacy Date: received 6 Oct 2020, last revised 21 Dec 2020 Contact author: mengfei_sdu at 163 com Available format(s): PDF | BibTeX Citation Version: 20201221:150522 (All versions of this report) Short URL: ia.cr/2020/1230