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Re: Challenge

 On Sept. 24, 2021, 12:36 p.m.

I am sorry you had difficulties to enter the solution.

And I am sorry that I bothered you with my own mistake ;-)
I somehow was under the impression that…

Re: Challenge

 On Sept. 24, 2021, 2:15 a.m.


if I'm not mistaken you once complained about a challenge that entering the correct solution was more difficult than solving the challenge itself.

Re: Challenge

 On Nov. 17, 2019, 8:41 p.m.

I think I should make an apology to everyone who has spent time solving this challenge and now can't enter the solution because it is being reworked as I feel …

Re: Challenge

 On Sept. 3, 2019, 8:34 a.m.

I couldn't agree more with Viktor: same program that I used to solve his Camouflage challenges worked without modifications for the Cloaked Substitution Cipher…

Re: Challenge

 On July 16, 2019, 6:16 p.m.

We replaced "for given initial values" by "for arbitrary initial

That was not really a big help. I still find the wording for Problem 2 extrem…

Re: Challenge

 On July 16, 2019, 5:40 a.m.

Once again, a challenge where it is more difficult to enter the intended solution than to solve the challenge itself!

We find a solution and then have to om…

Re: Challenge

 On July 16, 2019, 1:38 a.m.

I had no problem solving this challenge with Excel…

Re: Challenge

 On Aug. 4, 2016, 2:03 a.m.

Sure, send me a PM and I will have a look.

Re: Challenge

 On June 2, 2016, 11:13 a.m.

The codeword is mentioned in the plaintext. The German word for codeword is "Zugangsschluessel". I hope this helps.

Re: Problem accessing the "challenges" menu

 On May 30, 2016, 11:58 a.m.

Same problem here.

Re: Challenge

 On April 29, 2016, 1:08 a.m.

Hi Garnet,

'0' replacing by 'x' or 'y' and '1' replacing by 'z' is an example.
You have to find out by which character(s) '0' was replaced and by which cha…

Re: Challenge

 On Feb. 14, 2016, 9:58 p.m.

Yes, that is correct.

Re: Fermat works well, but...

 On Jan. 15, 2016, 3:32 p.m.

It's a while since I solved this challenge so I'm not quite sure, but I think this is your problem:
To get the plaintext it is not ct^d but ct^d mod N

I ho…

Re: Challenge

 On Sept. 14, 2015, 10:15 a.m.

I'm pretty sure the ciphertexts are still not ok.
They're good enough to get a solution, i.e. the first for words of message 1, but it is impossible to get 5 …

Re: The Book Code - A Challenge for Bookworms

 On April 2, 2015, 2:58 p.m.

Philippe, I received your PM.
Your plaintext is not completely correct but that's not a big problem.

Please read the task on page 5 of the pdf again.
I th…

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