MysteryTwister C3
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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).

Handycipher — Part 6

[kallick-14] - 5 users already solved this challenge.
 
 
 

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.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2016-06-28 19:59
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#5) Achieved points (Global score) y-m-d - h:m:s

Alain (Integral) 15666 (207924) 2016-08-16 23:27:18
Michael Möller (michaelm) 15124 (253046) 2016-10-03 10:57:55
George Lasry (george4096) 14276 (369910) 2017-05-28 23:48:45
Nicolas (nicosPavlov) 13925 (257791) 2018-03-06 14:54:25
#5 D3d4lu5 (D3d4lu5) 13748 (363282) 2018-11-04 23:47:38
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Handycipher — Part 5

[kallick-13] - 5 users already solved this challenge.
 
 
 

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.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2016-06-28 19:55
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#5) Achieved points (Global score) y-m-d - h:m:s

Alain (Integral) 15684 (207924) 2016-08-16 15:08:03
Michael Möller (michaelm) 15043 (253046) 2016-10-14 13:50:17
George Lasry (george4096) 14276 (369910) 2017-05-28 23:56:58
Nicolas (nicosPavlov) 13926 (257791) 2018-03-05 11:40:29
#5 D3d4lu5 (D3d4lu5) 13749 (363282) 2018-11-04 13:40:58
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Handycipher — Part 4

[kallick-12] - 4 users already solved this challenge.
 
 
 

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.
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Click here to get to the corresponding forum topic to share your opinion.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2016-06-28 19:50
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#4) Achieved points (Global score) y-m-d - h:m:s

Alain (Integral) 15684 (207924) 2016-08-15 21:12:28
George Lasry (george4096) 14276 (369910) 2017-05-29 00:06:01
Nicolas (nicosPavlov) 13928 (257791) 2018-03-03 03:12:00
D3d4lu5 (D3d4lu5) 13748 (363282) 2018-11-05 06:48:23
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Spirale — Part 4

[allard-04] - 0 users already solved this challenge.
 
 
 

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.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2015-08-23 19:11
Maximum number of attempts for this challenge: 15

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Handycipher — Part 3

[kallick-03] - 6 users already solved this challenge, 4 are working on it.
 
 
 

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.
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Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2015-03-03 23:40
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#6) Achieved points (Global score) y-m-d - h:m:s

Alain (Integral) 15093 (207924) 2015-06-12 19:31:53
Michael Möller (michaelm) 14592 (253046) 2015-09-23 19:08:45
Em Doulgerakis (Greko) 13977 (137334) 2016-09-13 10:59:28
George Lasry (george4096) 13775 (369910) 2017-05-27 02:00:58
#5 Nicolas (nicosPavlov) 13640 (257791) 2018-01-31 14:46:27
#6 D3d4lu5 (D3d4lu5) 13529 (363282) 2018-11-01 21:36:05
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   +++    [12:30 - 22.01.2021] Muskrat solved the Level I challenge 'M-138 — Part 1'    +++    [22:55 - 21.01.2021] RYW solved the Level I challenge 'Number Sequence — Part 2'    +++    [22:51 - 21.01.2021] RYW solved the Level I challenge 'Original Caesar Cipher'    +++    [22:48 - 21.01.2021] Muhamad solved the Level I challenge 'Original Caesar Cipher'    +++    [22:11 - 21.01.2021] RYW solved the Level I challenge 'Number Sequence'    +++