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Level III Challenges (72)
Page 5 of the challenges in Level III, ordered by date posted (the most recent appear first).
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Handycipher is a newly created cipher designed to permit pen-and-paper encrypting and decrypting, while providing a significantly high level of security. Part 6 is the same as Part 3, but uses an improved version of the cipher. It is a ciphertext-only challenge. 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: 2016-06-28 19:59 |
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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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Alain (Integral)
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15666 (207924) |
2016-08-16 23:27:18 |
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Michael Möller (michaelm)
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15124 (253046) |
2016-10-03 10:57:55 |
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George Lasry (george4096)
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14276 (372955) |
2017-05-28 23:48:45 |
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Nicolas (nicosPavlov)
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13925 (257791) |
2018-03-06 14:54:25 |
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#5 |
D3d4lu5 (D3d4lu5)
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13748 (363488) |
2018-11-04 23:47:38 |
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You must be logged in to solve the challenge |
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Handycipher is a newly created cipher designed to permit pen-and-paper encrypting and decrypting, while providing a significantly high level of security. Part 5 is the same as Part 2, but uses an improved version of the cipher. You are given the ciphertext and 229 letters occuring at an unknown location in the plaintext. 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: 2016-06-28 19:55 |
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Maximum number of attempts for this challenge: 15 |
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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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Alain (Integral)
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15684 (207924) |
2016-08-16 15:08:03 |
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Michael Möller (michaelm)
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15043 (253046) |
2016-10-14 13:50:17 |
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George Lasry (george4096)
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14276 (372955) |
2017-05-28 23:56:58 |
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Nicolas (nicosPavlov)
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13926 (257791) |
2018-03-05 11:40:29 |
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#5 |
D3d4lu5 (D3d4lu5)
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13749 (363488) |
2018-11-04 13:40:58 |
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You must be logged in to solve the challenge |
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Handycipher is a newly created cipher designed to permit pen-and-paper encrypting and decrypting, while providing a significantly high level of security. Part 4 is the same as Part 1, but uses an improved version of the cipher. You are given the ciphertext and the first 229 letters of the plaintext. 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: 2016-06-28 19:50 |
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Maximum number of attempts for this challenge: 15 |
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All successful users of this challenge
| Rank |
User (#4) |
Achieved points (Global score) |
y-m-d - h:m:s |
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Alain (Integral)
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15684 (207924) |
2016-08-15 21:12:28 |
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George Lasry (george4096)
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14276 (372955) |
2017-05-29 00:06:01 |
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Nicolas (nicosPavlov)
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13928 (257791) |
2018-03-03 03:12:00 |
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D3d4lu5 (D3d4lu5)
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13748 (363488) |
2018-11-05 06:48:23 |
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You must be logged in to solve the challenge |
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Spirale is a OTP cipher designed to be simply performed by hand.
Part 4 is a ciphertext-only challenge with a 485-letter ciphertext.
Unlike the other three parts of this series, this one uses four new random keys. 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 19:11 |
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Maximum number of attempts for this challenge: 15 |
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All successful users of this challenge
| No one solved the challenge right now. Be the first! |
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You must be logged in to solve the challenge |
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Handycipher is a newly designed cipher to permit pen-and-paper encrypting and decrypting, while providing a significantly high level of security. You got only the ciphertext of the 993-character plaintext. 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: 2015-03-03 23:40 |
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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 (#6) |
Achieved points (Global score) |
y-m-d - h:m:s |
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Alain (Integral)
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15093 (207924) |
2015-06-12 19:31:53 |
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Michael Möller (michaelm)
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14592 (253046) |
2015-09-23 19:08:45 |
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Em Doulgerakis (Greko)
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13977 (148908) |
2016-09-13 10:59:28 |
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George Lasry (george4096)
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13775 (372955) |
2017-05-27 02:00:58 |
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#5 |
Nicolas (nicosPavlov)
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13640 (257791) |
2018-01-31 14:46:27 |
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#6 |
D3d4lu5 (D3d4lu5)
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13529 (363488) |
2018-11-01 21:36:05 |
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You must be logged in to solve the challenge |
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