Robert777
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 Jan20 comment How can I break this encryption scheme? Wow, what a detailed answer. Thanks !! Jan20 accepted How can I break this encryption scheme? Jan19 asked How can I break this encryption scheme? Nov6 comment How can I construct a distinguisher given an inverter? @K.G. I'm sorry if that wasn't clear, but that's what I meant when I said I'm stuck (I thought it was obvious, I wasn't really trying to calculate the actual probability but simplify it so that it could easily be compared to the probability that you just mentioned). Do you know how is it possible to compare these probabilities ? I would appreciate any help... Nov5 awarded Custodian Nov5 reviewed Approve How can I construct a distinguisher given an inverter? Nov5 asked How can I construct a distinguisher given an inverter? Nov2 awarded Supporter Nov1 awarded Student Nov1 awarded Scholar Nov1 accepted Question about the definition of a perfect cipher Nov1 comment Question about the definition of a perfect cipher @mikeazo Yes it is. I don't understand what is the formal definition of a perfect cipher, so I don't even know where to start - what do I need to show ?? Nov1 comment Question about the definition of a perfect cipher @curious If it's more comfortable for you, you can ignore b and the requirement of p being a prime. How do you show that it's a perfect cipher ? Nov1 asked Question about the definition of a perfect cipher