Non-malleability for quantum public-key encryption

Christian Majenz, Christian Schaffner, and Jeroen van Wier

Abstract

Non-malleability is an important security property for public-key encryption (PKE). Its significance is due to the fundamental unachievability of integrity and authenticity guarantees in this setting, rendering it the strongest integrity-like property achievable using only PKE, without digital signatures. In this work, we generalize this notion to the setting of quantum public-key encryption. Overcoming the notorious "recording barrier" known from generalizing other integrity-like security notions to quantum encryption, we generalize one of the equivalent classical definitions, comparison-based non-malleability, and show how it can be fulfilled. In addition, we explore one-time non-malleability notions for symmetric-key encryption from the literature by defining plaintext and ciphertext variants and by characterizing their relation.

Available format(s)
Category
Public-key cryptography
Publication info
Preprint.
Keywords
public-key cryptographynon-malleabilityquantum cryptography
Contact author(s)
jeroen vanwier @ uni lu
History
Short URL
https://ia.cr/2019/496

CC BY

BibTeX

@misc{cryptoeprint:2019/496,
author = {Christian Majenz and Christian Schaffner and Jeroen van Wier},
title = {Non-malleability for quantum public-key encryption},
howpublished = {Cryptology ePrint Archive, Paper 2019/496},
year = {2019},
note = {\url{https://eprint.iacr.org/2019/496}},
url = {https://eprint.iacr.org/2019/496}
}

Note: In order to protect the privacy of readers, eprint.iacr.org does not use cookies or embedded third party content.