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Level I Challenges

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Challenge "Playfair Encryption"
By: admin on Dec. 22, 2010, 7:48 a.m.
9
13434
By: RandyWaterhouse  
Dec. 3, 2021, 7:51 a.m.
11
11892
By: RandyWaterhouse  
Nov. 10, 2021, 12:27 p.m.
Challenge "Heartbleed — Part 1 "
By: admin on Aug. 28, 2014, 2:32 p.m.
7
7958
By: Fountain  
Oct. 15, 2021, 12:47 a.m.
Challenge "Find the right route — Part 3"
By: admin on Dec. 26, 2020, 6:24 p.m.
7
552
By: Bart13  
Sept. 24, 2021, 12:36 p.m.
[  Go to the page:  123  ]
Challenge "One-Time Pad with Flaws"
By: admin on Nov. 12, 2010, 3:26 p.m.
33
54682
By: Konubixe  
May 21, 2021, 10:01 p.m.
[  Go to the page:  12  ]
Challenge "Classical Ciphers^3"
By: admin on May 7, 2010, 1:23 p.m.
19
55694
By: nbr90  
May 19, 2021, 4:32 p.m.
8
733
By: sir5  
May 19, 2021, 7:33 a.m.
Challenge "Number Sequence — Part 9"
By: admin on Nov. 16, 2017, 5:43 p.m.
4
1816
By: ExAstris  
May 7, 2021, 6:03 p.m.
Challenge "Autokey Cipher"
By: admin on Sept. 25, 2018, 2:21 p.m.
1
1022
By: Konubixe  
May 4, 2021, 10:14 p.m.
0
219
By: admin  
April 21, 2021, 7:17 p.m.
[  Go to the page:  123  ]
Challenge "Modified Caesar Cipher"
By: admin on Sept. 2, 2011, 1:03 p.m.
31
42182
By: sir5  
April 17, 2021, 5:40 a.m.
Challenge "Find the right route — Part 2"
By: admin on Dec. 19, 2020, 4:53 p.m.
2
391
By: tryone144  
April 1, 2021, 6:20 p.m.
1
1380
By: imad  
March 31, 2021, 7:49 p.m.
Challenge "Zodiac Cipher"
By: admin on Aug. 2, 2010, 4:12 p.m.
9
15395
By: tryone144  
March 26, 2021, 1:12 p.m.
Challenge "Find the right route — Part 1"
By: admin on Oct. 27, 2020, 5:01 p.m.
2
336
By: Konubixe  
March 25, 2021, 5:51 p.m.
[  Go to the page:  12  ]
Challenge "Number Sequence — Part 5"
By: admin on April 18, 2012, 7:30 p.m.
22
36108
By: Konubixe  
March 22, 2021, 4:08 p.m.
3
4175
By: madness  
Feb. 22, 2021, 3:47 a.m.
[  Go to the page:  12  ]
Challenge "Grille Cipher"
By: admin on Oct. 14, 2011, 6:04 p.m.
17
24158
By: Theofanidis  
Feb. 20, 2021, 5:07 p.m.
Challenge "An 'unhearable' message"
By: admin on June 5, 2012, 7:58 p.m.
12
25555
By: itnomad  
Feb. 4, 2021, 10:03 p.m.
[  Go to the page:  12  ]
Challenge "Pigpen with a twist — Part 1"
By: admin on Sept. 2, 2011, 1:08 p.m.
23
47176
By: Theofanidis  
Jan. 20, 2021, 10:56 p.m.

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