Level X Challenges (11)
Page 1 of the challenges in Level X, ordered by date posted (the most recent appear first).
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In 1586 the famous French mathematician Blaise de Vigenère published a picture of the night sky and claimed that a message was concealed in it. Can you find out how to decipher this message? Read more...
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Author:
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Published on: 2012-05-01 10:31 |
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Maximum number of attempts for this challenge: 0 |
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All successful users of this challenge
| Rank |
User (#3) |
Achieved points (Global score) |
y-m-d - h:m:s |
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Viktor (Veselovský) |
2000 (56663) |
2012-05-04 03:23:00 |
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Armin Krauss (argh) |
1807 (75549) |
2012-05-05 18:20:00 |
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J. M. (jomandi) |
1613 (74074) |
2012-05-13 13:00:00 |
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In 2006 the distributed "M4 Message Breaking Project" under the lead of Stefan Krah aimed at decrypting three ENIGMA M4 messages from the time of World War II. Two of the three messages where decrypted within the first weeks. However, the third message withstood despite all efforts and remained unbroken.
Today, the M4 project has been discontinued with the last message still unbroken. The task of this challenge is to break this very last message - after all, a few years have past since the project was discontinued and cryptanalysis and computational power also advanced during this time. Read more...
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Author:
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Published on: 2011-09-21 18:45 |
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Maximum number of attempts for this challenge: 0 |
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All successful users of this challenge
| No one solved the challenge right now. Be the first! |
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An unsolved FBI case: In 1999, an encrypted message was found in the pockets of a murder victim. No one was able to decrypt it so far. Read more...
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Author:
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Published on: 2011-04-07 00:00 |
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Maximum number of attempts for this challenge: 0 |
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All successful users of this challenge
| No one solved the challenge right now. Be the first! |
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Ku Klux Klan
[schmeh-06] - 5 users already solved this challenge .
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In 1923, a member of the Ku Klux Klan sent an encrypted telegram to one of his colleagues. This telegram could be preserved.
More than 60 years later, the US mathematician Cipher Deavours examined the telegram and was able to decipher it. In 1989, he published some of the details about the solution in the magazine Cryptologia („A Ku Klux Klan Cipher“, edition 3/1989). However, he didn‘t tell the complete solution – the last part was left to the reader as an exercise. Read more...
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Author:
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Published on: 2010-10-14 13:30 |
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Maximum number of attempts for this challenge: 0 |
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All successful users of this challenge
| Rank |
User (#5) |
Achieved points (Global score) |
y-m-d - h:m:s |
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Seth Kintigh (DarkFibre) |
2000 (57644) |
2011-06-14 08:39:00 |
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Viktor (Veselovský) |
1000 (56663) |
2011-11-08 13:52:00 |
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The Killer (Killer) |
1000 (31504) |
2011-11-13 15:30:00 |
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J. M. (jomandi) |
1000 (74074) |
2011-11-13 19:02:00 |
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#5 |
Bart den Hartog (Bart13) |
1000 (34701) |
2012-02-10 18:45:00 |
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Unknown Author
[schroedel-02] - 0 users already solved this challenge .
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The author of the German book "The Art of Deciphering", written 1808 remains unknown. However, the editor signs the preface with a cipher (Semicolon Plus One Triangle Plus Circle Period). Is this the encrypted name of the author? Read more...
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Author:
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Published on: 2010-10-14 13:30 |
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Maximum number of attempts for this challenge: 0 |
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All successful users of this challenge
| No one solved the challenge right now. Be the first! |
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