Friedman test _

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I have a question. I read that friedman's test was something like this:

Friedman's test tries to find out the period of the cipher by calculating several values of Κ (C, C ^ n) n, where C ^ n represents the ciphertext with n shifts on the left, thus determining the value most likely the figure.

But deep down, what does Κ do? overlap the two texts and see indices of coincidence? Can anyone explain this method better?

    
asked by anonymous 03.01.2016 / 16:59

0 answers