| Letter to the Templars — Part 3 | 1,126 | Dec. 17, 2014, 5:35 p.m. |
| Snow White and the seven dwarfs | 100 | Dec. 17, 2014, 4:43 p.m. |
| Cracking SHA1-Hashed Passwords | 1,109 | Dec. 17, 2014, 2:48 p.m. |
| Modified Caesar Cipher | 100 | Sept. 12, 2012, 3:43 p.m. |
| Letter to the Templars — Part 2 | 102 | Sept. 12, 2012, 11:04 a.m. |
| Letter to the Templars — Part 1 | 102 | Sept. 12, 2012, 11 a.m. |
| Beaver Code | 103 | Sept. 12, 2012, 8:10 a.m. |
| Factorization Cipher — Part 2 | 1,613 | Dec. 6, 2011, 8:08 p.m. |
| ADFGVX — Part 1 | 101 | Nov. 25, 2011, 11:06 p.m. |
| ADFGVX — Part 2 | 101 | Nov. 24, 2011, 10:05 p.m. |
| A really long number sequence | 1,266 | Nov. 7, 2011, 9:23 a.m. |
| Grille Cipher | 113 | Oct. 22, 2011, 12:19 p.m. |
| Factorization Cipher — Part 1 | 120 | Oct. 22, 2011, 11:52 a.m. |
| Affine Codes / Modulo Arithmetic with N / Extended Euclid | 150 | Sept. 10, 2011, 1:38 p.m. |