Quantum security of the Fujisaki-Okamoto transform

Quantum security of the Fujisaki-Okamoto transformE. E. Targhi and D. Unruh (QCrypt 2015). Poster.  [publisher's version]

Abstract: In this paper, we present a hybrid encryption scheme that is chosen ciphertext secure in the quantum random oracle model. Our scheme is a combination of an asymmetric and a symmetric encryption scheme that are secure in a weak sense. It is a slight modification of Fujisaki and Okamoto's transformation that is secure against classical adversaries.

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