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Level III Challenges (72)
Page 6 of the challenges in Level III, ordered by date posted (the most recent appear first).
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The ORYX stream cipher consists of three 32-bit LFSRs X, A, B which are shifted differently depending on some bits in the LFSR X. The key stream is a combination of the highest 8 bits of each of the three LFSRs. It is neither feasible nor necessary to search the whole 96-bit key space, there are more efficient methods! 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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Authors:
This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it. |
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Published on: 2014-04-14 20:39 |
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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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The ORYX stream cipher consists of three 32-bit LFSRs X, A, B which are shifted differently depending on some bits in the LFSR X. The key stream is a combination of the highest 8 bits of each of the three LFSRs. It is neither feasible nor necessary to search the whole 96-bit key space, there are more efficient methods! 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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Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it. |
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Published on: 2014-04-14 20:38 |
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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 (#2) |
Achieved points (Global score) |
y-m-d - h:m:s |
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S Combes (jerva)
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14283 (218893) |
2015-03-10 22:57:57 |
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George Lasry (george4096)
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13594 (372955) |
2017-06-27 11:31:13 |
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The double columnar transposition is considered to be one of the best manual encryption systems. This sequence considers vulnerabilities that have been used to solve the corresponding level X challenge. The three challenges of the sequence have an increasing difficulty. In the third part a German plaintext has been encrypted with 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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Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it. |
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Published on: 2013-12-11 20:11 |
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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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The double columnar transposition is considered to be one of the best manual encryption systems. This sequence considers vulnerabilities that have been used to solve the corresponding level X challenge. The three challenges of the sequence have an increasing difficulty. In the second part two interleaved English texts have been encrypted with 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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Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it. |
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Published on: 2013-12-11 20:11 |
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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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The double columnar transposition is considered to be one of the best manual encryption systems. This sequence considers vulnerabilities that have been used to solve the corresponding level X challenge. The three challenges of the sequence have an increasing difficulty. In the first part an English plaintext has been encrypted with keys derived from English sentences. 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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Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it. |
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Published on: 2013-12-11 20:09 |
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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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