Level II Challenges (149)
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] - 4 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...
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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 (#4) |
Achieved points (Global score) |
y-m-d - h:m:s |
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S Combes (jerva)
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1378 (170300) |
2015-09-12 21:12:42 |
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J-L Morel (Rossignol)
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1143 (37723) |
2017-01-19 15:14:20 |
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George Lasry (george4096)
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1129 (351773) |
2017-08-21 20:56:27 |
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Kurt Gebauer (Yokozuna)
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1103 (266506) |
2020-01-28 12:24:14 |
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