Challenge "Enigma Part 1"  

  By: admin on Aug. 17, 2010, 12:27 p.m.

Decrypt the given ciphertext which is encrypted with the Enigma chiper. The wanted key conists of the configuration of the Enigma. Please give the letters in the key as capital letters.

 Last edited by: admin on Oct. 31, 2021, 2:54 a.m., edited 1 time in total.

Re: Challenge "Enigma"  

  By: guru on Oct. 21, 2010, 7:22 p.m.

i have a problem with the checking system. i used the implemented enigma algorithm to decrypt the text. but when i try to check the solution, it says, it is wrong !?

Re: Challenge "Enigma"  

  By: admin on Oct. 21, 2010, 7:39 p.m.

I took a look at the logs. The checking system is correct, your solution is incorrect.

//edit: I'm sorry that I can't help more, but I'm only the technical admin of this site. I'm not familiar with all of the challenges. Maybe someone else can answer your question in detail.

Re: Challenge "Enigma"  

  By: guru on Oct. 21, 2010, 7:53 p.m.

thx for your reply.
do you know who is responsibile for this challange ?

the code inside the ZIP file requires the following format:
./enigma 123 B EFG
so 123 are the rotors, B is the endpart and EFG are the startings positions.
so the format for checking it should be: 123BEFG

Re: Challenge "Enigma"  

  By: mazze on Oct. 21, 2010, 8:53 p.m.

The challenge is to find the key for decrypting the file enigmaCipher1.txt, and not decrypting the example given for the implementation of the enigma.

Re: Challenge "Enigma"  

  By: sbartz on Oct. 26, 2010, 10:30 a.m.

Hello all,

I find the Enigma challenge rather puzzling. So far, I failed to solve the Enigma I challenge but succeeded with the Enigma II one.

I do not quite understand what the hint "…but it may not be entirely straightforward to recognize it as such" means. All the approaches that were successful in the Enigma II challenge fail to deliver the correct result here.

Any hints as to how to tackle this challenge are appreciated! Is there any kind of underlying obfuscation?


Re: Challenge "Enigma"  

  By: rwst on Oct. 26, 2010, 7:33 p.m.

Any hints as to how to tackle this challenge are appreciated! Is there any kind of underlying obfuscation?

I think if you have solved Enigma2 you should have applied the same method for recognising what is a possible solution. With that method, the solution in Enigma1 will stand out, too.

Hope this didn't give away anything for other solvers (or even for you ;)

Re: Challenge "Enigma"  

  By: sbartz on Oct. 27, 2010, 11:41 a.m.

Hello all,

This challenge is driving me nuts. I am sure to be running correct code but all results I get are rubbish.

The scoring algorithm that worked like a charm with the Enigma II challenge produces no results that would make any sense. The maximum score is not even getting close to what I would expect. Maybe someone can give me a broad hint? I have no clue what I am doing wrong.

Thanks and regards

Re: Challenge "Enigma"  

  By: nobody on Oct. 27, 2010, 12:04 p.m.


but it may not be entirely straightforward to recognize it as such

try to understand the converse of straightforward …

Re: Challenge "Enigma"  

  By: sbartz on Oct. 27, 2010, 1:59 p.m.

… I guess I have to give up on this one. I reckon there must be more to the challenge than just deciphering the cryptogram with the Enigma implemenation.

Am I right assuming that the "plaintext" fed into the Enigma is not as plain as the word plaintext suggests? Any sort of encryption scheme applied to the plaintext before enciphering it with the Enigma?


Re: Challenge "Enigma Part 1"  

  By: sbartz on Oct. 28, 2010, 2:20 p.m.

Thanks for your hints, I finally solved it!


Re: Challenge "Enigma Part 1"  

  By: stef_the_chef on July 23, 2011, 3:18 p.m.


Ich komm hier leider auch überhaupt nicht weiter.
Sind die Ringe auch auf den Rotoren?

Re: Challenge "Enigma Part 1"  

  By: fretty on July 23, 2011, 4:48 p.m.

I have tried using other simulators (since I have no idea how to open or use the one provided) but cant even make sense of the provided plaintext/ciphertext pair. This must be due to the way the rotors are constructed differing between your program and others.

EDIT: I opened the C file using notepad and found out what setting you are using…also I noted the website contained within.

This is an amazing simulator but does it let me change the reflector?

Re: Challenge "Enigma Part 1"  

  By: TBREAKER on July 23, 2011, 11:19 p.m.

The rotors of the provided C-Code are correctly wired.

But the numeration is different from the most freeware simulators.
C-code: 0 1 2 3 4
original Enigma: 1 2 3 4 5 (I II III IV V)

You need the c-code or you write your own Enigma engine plus the decipher algorithm.

With the provided c-code you can use reflektor B and C.


PS: You can also try this simulator:
But note: You can not find an unknown key with those freeware simulators!

Challenge "Enigma Part 1"  

  By: Theofanidis on Jan. 7, 2013, 3:37 p.m.

Hello everybody

Is there a possibility that the first or even better and the second letter of the plaintext are revealed as an extra hint, since i tried using some known texts from putative english poetry "not entirely straightforward". Now i have implemented a program that calculates all possibles combinations but all of them are more than 2000000 posibilities. if these letters are revealed still no one can find the putative English poetry but if one tries "brute-forcing" one can lessen the possibilities keeping it as a Level 2 challenge.

Secondly i do not know if one says that "it cannot be recognized as english poetry" if it means that the linguistic of this kind of poetry does not contain correct spelling english words or it it contains "enigma" format words

If the mtc3 team thinks that these details are forbidden to be published for all maybe some of them might be revealed by a PM since i think few are using "brute-force". This way more members might be helped to solve these type of challenges

Best regards

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