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math.GR2021
The -Möbius function of a finite group
Francesca Dalla Volta, Andrea Lucchini
The Möbius function of the subgroup lettice of a finite group has been introduced by Hall and applied to investigate several different questions. We propose the following gener…
math.GR2021
On the primitivity of the AES-128 key-schedule
Riccardo Aragona, Roberto Civino, Francesca Dalla Volta
The key-scheduling algorithm in the AES is the component responsible for selecting from the master key the sequence of round keys to be xor-ed to the partially encrypted state at e…