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On Compression Functions over Small Groups with Applications to Cryptography. (arXiv:2208.02468v1 [math.GR])
Aug. 5, 2022, 1:20 a.m. | Koji Nuida
cs.CR updates on arXiv.org arxiv.org
In the area of cryptography, fully homomorphic encryption (FHE) enables any
entity to perform arbitrary computation on encrypted data without decrypting
the ciphertexts. An ongoing group-theoretic approach to construct FHE schemes
uses a certain "compression" function $F(x)$ implemented by group operators on
a given finite group $G$ (i.e., it is given by a sequence of elements of $G$
and variable $x$), which satisfies that $F(1) = 1$ and $F(\sigma) = F(\sigma^2)
= \sigma$ where $\sigma \in G$ is some element …
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