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Re: Challenge "The Playfair Encryption"

 On Feb. 3, 2011, 11:26 a.m.


you are right, if you know the keyword(s) (it doesn't necessarily have to be one word) you´ll break the cipher. So, what would be the point to provide t…

Re: Challenge

 On Jan. 22, 2011, 9:55 p.m.

Hello Wolfgang,

thanks for the feedback!
The challenge is, in principle, quite easy if you know how to solve it. I cannot give you the exact reason why thi…

Re: Challenge "The Playfair Encryption"

 On Jan. 10, 2011, 11:55 a.m.

Hi there,

yes, both texts do have the same key and short key means less than 10 characters… And if you read a little about the Playfair encryption you'll se…

Re: Challenge "Sigaba Part 1"

 On Dec. 2, 2010, 11:01 a.m.

Sorry for being late with the answer but it seems that Prof. Stamp, the author of the given Sigaba-Code, has a great deal of other work to do.
I would sa…

Re: Challenge "Sigaba Part 2"

 On Nov. 12, 2010, 7:46 p.m.


Re: Challenge

 On Nov. 4, 2010, 1:52 p.m.

Please be aware that you get the wanted solution for this challenge only if you interpret the ciphertext explicit without padding!
Even if you interpret the g…

Re: Challenge "Sigaba Part 1"

 On Oct. 28, 2010, 12:36 p.m.

Now you even got one more character then in the challenge description… [HTML_REMOVED]


Re: Challenge "Sigaba Part 1"

 On Oct. 27, 2010, 12:09 p.m.

Hi Ralf,

maybe the wording in the challenge text is a little bit confusing but the given plaintext appears AT THE BEGINNING of the searched plaintext. Other…

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