Level II Challenges (155)
Page 1 of the challenges in
Level II, ordered by date posted (the most recent appear first).
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Spirale — Part 1
[allard-01] - 5 users already solved this challenge, 2 are working on it.
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Spirale is a OTP cipher designed to be simple to implement by hand. It is resilient to errors as they have only a local effect without obscuring all the ciphertext.
Part 1 is a partly-known plaintext challenge with a 314-letter ciphertext. The first 75 letters of the plaintext are known.
Part 2 of this series uses the same four keys as this one. Read more...
Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.
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Author:
This email address is being protected from spambots. You need JavaScript enabled to view it. |
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Published on: 2015-08-23 19:04 |
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Maximum number of attempts for this challenge: 15 |
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All successful users of this challenge
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User (#5) |
Achieved points (Global score) |
y-m-d - h:m:s |
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S Combes (jerva)
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1378 (218893) |
2015-09-12 21:12:42 |
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J-L Morel (Rossignol)
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1143 (42130) |
2017-01-19 15:14:20 |
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George Lasry (george4096)
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1129 (372955) |
2017-08-21 20:56:27 |
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Kurt Gebauer (Yokozuna)
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1103 (276906) |
2020-01-28 12:24:14 |
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#5 |
D3d4lu5 (D3d4lu5)
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1098 (363488) |
2021-01-19 19:42:42 |
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