Welcome to the resource topic for 2018/838
Title:
(Tightly) QCCA-Secure Key-Encapsulation Mechanism in the Quantum Random Oracle Model
Authors: Keita Xagawa, Takashi Yamakawa
Abstract:This paper studies indistinguishability against quantum chosen-ciphertext attacks (IND-qCCA security) of key-encapsulation mechanisms (KEMs) in quantum random oracle model (QROM). We show that the SXY conversion proposed by Saito, Yamakawa, and Xagawa (EUROCRYPT 2018) and the HU conversion proposed by Jiang, Zhang, and Ma (PKC 2019) turn a weakly-secure deterministic public-key encryption scheme into an IND-qCCA-secure KEM scheme in the QROM. The proofs are very similar to those for the IND-CCA security in the QROM, easy to understand, and as tight as the original proofs.
ePrint: https://eprint.iacr.org/2018/838
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