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Kyber terminates
May 22, 2023, 6:54 a.m. |
IACR News www.iacr.org
ePrint Report: Kyber terminates
Manuel Barbosa, Peter Schwabe
The key generation of the lattice-based key-encapsulation mechanism CRYSTALS-Kyber (or short, just Kyber) involves a rejection-sampling routine to produce coefficients modulo $q=3329$ that look uniformly random. The input to this rejection sampling is output of the SHAKE-128 extendable output function (XOF). If this XOF is modelled as a random oracle with infinite output length, it is easy to see that Kyber terminates with probability 1; also, in this model, for any upper …
crystals-kyber eprint report function input key oracle peter random report the key
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