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- W1571492904 abstract "This paper came to existence out of the desire to understand iterations of strictly triangular polynomial maps over finite fields. This resulted in two connected results: First, we give a generalization of $F_p$-actions on $F_p^n$ and their description by iterative higher derivations, namely $Z$-actions on $F_p^n$ and show how to describe them by what we call $Z$-flows. We prove equivalence between locally finite polynomial automorphisms (LFPEs) over finite fields and $Z$-flows over finite fields. We elaborate on $Z$-flows of strictly triangular polynomial maps. Second, we describe how one can efficiently evaluate iterations of triangular polynomial permutations on $F_p^n$ which have only one orbit. We do this by determining the equivalence classes in the triangular permutation group of such elements. We show how to conjugate them all to the map $zlp z+1$ on the ring $Z/p^nZ$ (which is identified with $F_{p^n}$), making iterations trivial. An application in the form of fast-forward functions from cryptography is given." @default.
- W1571492904 created "2016-06-24" @default.
- W1571492904 creator A5024577580 @default.
- W1571492904 date "2011-06-28" @default.
- W1571492904 modified "2023-09-27" @default.
- W1571492904 title "Triangular polynomial $Z$-actions on $F_p^n$ and a cryptographic application" @default.
- W1571492904 hasPublicationYear "2011" @default.
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