ZHF E, 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 modification, ZHFE−, a multivariate encryption scheme which retains the security and performance properties of ZHFE while optimizing key size in this theoretical framework.
CITATION STYLE
Perlner, R., & Smith-Tone, D. (2016). Security analysis and key modification for ZHFE. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 9606, pp. 197–212). Springer Verlag. https://doi.org/10.1007/978-3-319-29360-8_13
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