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Level I Challenges

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Challenge "Modular Sequences"
By: admin on Sept. 25, 2018, 2:19 p.m.
10
4917
By: tryone144  
Jan. 18, 2021, 6:08 p.m.
[  Go to the page:  12345  ]
Challenge "Monoalphabetic Substitution"
By: admin on May 19, 2010, 10:08 a.m.
68
160299
By: tryone144  
Jan. 13, 2021, 6:13 p.m.
Challenge "Factorization Cipher — Part 1"
By: admin on Oct. 17, 2011, 6:42 p.m.
13
22552
By: itnomad  
Jan. 13, 2021, 5:20 p.m.
[  Go to the page:  12  ]
Challenge "Beaver Code"
By: admin on Aug. 13, 2012, 8:15 p.m.
19
23866
By: itnomad  
Jan. 9, 2021, 1:47 p.m.
Challenge "Number Sequence — Part 2"
By: admin on July 11, 2011, 2:35 p.m.
8
26841
By: ker2x  
Dec. 13, 2020, 4:24 p.m.
[  Go to the page:  12  ]
Challenge "Letter to the Templars — Part 1"
By: admin on July 16, 2012, 9:09 p.m.
15
20588
By: tryone144  
Oct. 8, 2020, 1:12 a.m.
8
18996
By: Veselovský  
June 9, 2020, 11 p.m.
[  Go to the page:  123  ]
Challenge "Snow White and the seven dwarfs"
By: Javex on April 20, 2013, 11:26 a.m.
30
25877
By: tryone144  
March 30, 2020, 8:57 p.m.
[  Go to the page:  12  ]
Challenge "Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1"
By: admin on April 7, 2011, 9:34 a.m.
21
40042
By: tryone144  
March 22, 2020, 9:34 p.m.
[  Go to the page:  123  ]
Challenge "Enigma Combinatorics"
By: admin on Nov. 12, 2010, 3:29 p.m.
35
66081
By: madness  
Feb. 17, 2020, 3:44 p.m.
help
By: dinaPWBF on Feb. 8, 2020, 1:58 p.m.
1
582
By: ancat  
Feb. 9, 2020, 7:40 p.m.
Challenge "Molehunt (Part 1/3)"
By: admin on Oct. 22, 2010, 4:01 p.m.
10
28344
By: sexton  
Aug. 3, 2019, 11:08 a.m.
Challenge "Number Sequence — Part 10"
By: admin on April 18, 2018, 4:56 p.m.
8
4130
By: Bart13  
July 16, 2019, 1:38 a.m.
Challenge "A hidden word"
By: Javex on Jan. 6, 2013, 2:35 p.m.
2
7208
By: Theofanidis  
July 9, 2019, 8:19 a.m.
9
5357
By: sexton  
June 30, 2019, 5:58 p.m.
Challenge "Advent-Challenge — Part 1"
By: admin on Dec. 8, 2017, 7:24 p.m.
2
2617
By: ancat  
June 29, 2019, 11:28 a.m.
2
1205
By: MarquisDeSud  
May 14, 2019, 4:30 p.m.
Help
By: jrox on March 27, 2018, 4:01 a.m.
2
1420
By: rafaelot030  
March 31, 2019, 1:54 p.m.
[  Go to the page:  12  ]
Challenge "Double Columnar Transposition"
By: admin on Oct. 12, 2011, 2:05 p.m.
20
45464
By: madness  
Feb. 27, 2019, 1:30 p.m.
Challenge "Turing Bombe Enigma I"
By: admin on Oct. 17, 2011, 6:36 p.m.
7
18309
By: silva  
Dec. 2, 2018, 2:07 p.m.

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