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.
February 24-26, 2016
PQCrypto 2016: The Seventh International Conference on Post-Quantum Cryptography
and Smith-Tone, D.
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 December 9, 2023)