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Security Analysis and Key Modification for ZHFE

Published

Author(s)

Ray A. Perlner, Daniel C. Smith-Tone

Abstract

ZHFE, designed by Porras et al., is one of the few promising candidates for a multivariate public-key encryption algorithm. In this article we extend and expound upon the existing security analysis on this scheme. We prove security against differential adversaries, complementing a more accurate and robust discussion of resistance to rank and algebraic attacks. We further suggest a modi cation, ZHFE-, a multivariate encryption scheme which retains the security and performance properties of ZHFE while optimizing key size in this theoretical framework.
Volume
9606
Conference Dates
February 24-26, 2016
Conference Location
Fukuoka
Conference Title
PQCrypto 2016: The Seventh International Conference on Post-Quantum Cryptography

Keywords

Multivariate Cryptography, HFE, ZHFE, Discrete Differential, MinRank, Q-rank

Citation

Perlner, R. and Smith-Tone, D. (2016), Security Analysis and Key Modification for ZHFE, PQCrypto 2016: The Seventh International Conference on Post-Quantum Cryptography, Fukuoka, -1, [online], https://doi.org/10.1007/978-3-319-29360-8_13 (Accessed June 23, 2024)

Issues

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Created February 4, 2016, Updated November 10, 2018