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Re:Show HN: Beamsplitter – a new possibly universal hash by mfbx9da4 on Thursday May 07, 2020 @11:26AM (#23104078)
What's an S-box (substitution-box)?
Re:Show HN: Beamsplitter – a new possibly universal hash by underdeserver on Thursday May 07, 2020 @12:05PM (#23104545)
An arbitrary function of X bits to Y bits. You generally want to pick these to be as non-linear as possible.