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Searching for ELFs in the Cryptographic Forest
Sept. 24, 2023, 6:18 a.m. |
IACR News www.iacr.org
ePrint Report: Searching for ELFs in the Cryptographic Forest
Marc Fischlin, Felix Rohrbach
Extremely Lossy Functions (ELFs) are families of functions that, depending on the choice during key generation, either operate in injective mode or instead have only a polynomial image size. The choice of the mode is indistinguishable to an outsider. ELFs were introduced by Zhandry (Crypto 2016) and have been shown to be very useful in replacing random oracles in a number of applications.
One open question is …
cryptographic eprint report forest functions image key lossy mode report size
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