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seen Oct 13 at 3:03

Oct
10
comment Cryptanalysis of S-DES - Equations
@fgrieu: You hit the nail on the head. My professor just pointed it out to me.
Oct
5
comment Cryptanalysis of S-DES - Equations
I'm not able to verify the equations in both the ways, so I'm not sure how the equations were derived.
Sep
18
comment How many keys does the Playfair Cipher have?
Thanks to you too. You did give me the correct answer, but I was also looking for the number of unique keys too.
Sep
18
comment How many keys does the Playfair Cipher have?
I believe you've given the correct answer. Thanks!
Sep
18
comment How many keys does the Playfair Cipher have?
Sorry, I seem to have missed the word 'twenty' in there. You are correct, it should be 26
Sep
12
comment How many keys does the Playfair Cipher have?
How about if we ignore the duplicate keys ?