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Level I Challenges

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Challenge "Music Code — Part 1"
By: admin on March 23, 2011, 2:02 p.m.
20
49184
By: newton  
April 3, 2023, 10:49 a.m.
Challenge "Merkle-Hellman Knapsack Challenge - Part 1"
By: admin on Oct. 14, 2022, 5:28 p.m.
1
377
By: jasiejames  
Feb. 5, 2023, 8:20 p.m.
[  Go to the page:  1, 2, 3  ]
Challenge "Kaskade-S/T — Part 1"
By: admin on March 4, 2011, 3:06 p.m.
38
45987
By: rwst  
Jan. 2, 2023, 9:16 a.m.
Challenge "The Last Note"
By: admin on Sept. 22, 2014, 10:13 p.m.
11
11467
By: newton  
Dec. 17, 2022, 7:52 p.m.
Challenge "Find the right route — Part 2"
By: admin on Dec. 19, 2020, 4:53 p.m.
5
1564
By: Integral  
Dec. 14, 2022, 7:03 p.m.
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Challenge "Caesar Encryption"
By: admin on Oct. 21, 2010, 4:26 p.m.
100
198679
By: Theofanidis  
Oct. 31, 2022, 6:45 p.m.
Challenge "The Syllabary Cipher -- Part 1"
By: admin on Oct. 28, 2022, 1:27 p.m.
0
331
By: admin  
Oct. 28, 2022, 1:27 p.m.
Challenge "Number Sequence"
By: admin on May 19, 2010, 10:05 a.m.
13
24299
By: puttputt86  
Sept. 20, 2022, 6:13 p.m.
Challenge "Cryptanalysis Hacking Puzzles — Part 1"
By: admin on Oct. 26, 2018, 8:33 p.m.
3
2355
By: Konubixe  
Sept. 13, 2022, 10:10 p.m.
Challenge "From Russia with Love"
By: admin on Sept. 4, 2013, 4:30 p.m.
11
10573
By: newton  
Sept. 8, 2022, 9:44 a.m.
Challenge "Image Noise"
By: admin on Nov. 20, 2015, 8:26 p.m.
6
7609
By: Di-crypt  
Sept. 7, 2022, 5:24 a.m.
Challenge "Enigma Messages with Repeated Letters — Part 2"
By: admin on Oct. 28, 2013, 8:53 p.m.
2
5562
By: newton  
Sept. 5, 2022, 11:52 p.m.
Challenge "Wheatstone Cryptograph — Part 1"
By: admin on April 21, 2021, 7:17 p.m.
1
1116
By: Phloryn  
Aug. 19, 2022, 12:49 p.m.
Challenge "Modified Vigenère Cipher"
By: admin on Jan. 24, 2022, 11:56 a.m.
5
3000
By: Theofanidis  
July 11, 2022, 3:06 p.m.
Challenge "Alberti Challenge - Part 1"
By: admin on March 26, 2022, 8:45 p.m.
1
951
By: seafischer  
June 3, 2022, 1:51 p.m.
Challenge "Heartbleed — Part 2"
By: admin on Aug. 28, 2014, 2:34 p.m.
11
13596
By: robot.txt  
May 17, 2022, 8:46 a.m.
Challenge "Heartbleed — Part 1"
By: admin on Aug. 28, 2014, 2:32 p.m.
9
10230
By: robot.txt  
May 17, 2022, 8:43 a.m.
Challenge "Trifid Cipher"
By: admin on Oct. 28, 2013, 8:49 p.m.
4
6305
By: BOBTMSJ  
May 10, 2022, 11:28 p.m.
Challenge "Polyhomophonic Substitution — Part 1"
By: admin on March 22, 2020, 1:57 a.m.
3
1342
By: seafischer  
April 28, 2022, 8:34 p.m.
Challenge "ECDH-Key Exchange for Beginners"
By: admin on Feb. 24, 2012, 12:02 a.m.
9
20974
By: RandyWaterhouse  
April 14, 2022, 1:10 p.m.
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