| How do you become a big cryptographer? | 100 | Jan. 2, 2014, 9:54 p.m. |
| Broadcasting and low exponent — RSA Attack | 1,122 | Jan. 2, 2014, 11:08 a.m. |
| Reserve Hand Procedure — Part 1 | 100 | Jan. 2, 2014, 10:31 a.m. |
| Alice's Birthday Party (Part 2) | 1,113 | Jan. 1, 2014, 7:34 p.m. |
| Alice's Birthday Party (Part 1) | 1,113 | Jan. 1, 2014, 4:36 p.m. |
| One-Time Pad with Flaws | 100 | Jan. 1, 2014, 1:05 p.m. |
| Modified Caesar Cipher | 100 | Dec. 31, 2013, 5:44 p.m. |
| A modified homophonic cipher with reduced alphabets — Part 2 | 100 | Dec. 31, 2013, 2:11 p.m. |
| A modified homophonic cipher with reduced alphabets — Part 1 | 100 | Dec. 31, 2013, 1:41 p.m. |
| Snow White and the seven dwarfs | 100 | Dec. 31, 2013, 1:33 p.m. |
| A hidden word | 100 | Dec. 31, 2013, 12:30 p.m. |
| RSA Factoring Challenge: RSA-704 | 0 | Dec. 31, 2013, 10:51 a.m. |
| RSA Factoring Challenge: RSA-210 | 0 | Dec. 31, 2013, 10:49 a.m. |
| Letter to the Templars — Part 3 | 1,148 | Dec. 31, 2013, 10:31 a.m. |
| Letter to the Templars — Part 2 | 100 | Dec. 31, 2013, 10:20 a.m. |
| Letter to the Templars — Part 1 | 100 | Dec. 31, 2013, 10:04 a.m. |
| Affine Codes / Modulo Arithmetic with N / Extended Euclid | 100 | Dec. 31, 2013, 9:48 a.m. |
| Grille Cipher | 100 | Dec. 30, 2013, 4:32 p.m. |
| Number Sequence — Part 5 | 100 | Dec. 29, 2013, 10:59 p.m. |
| Monoalphabetic Substitution | 100 | Dec. 29, 2013, 10:15 p.m. |
| Factorization Cipher — Part 1 | 100 | Dec. 29, 2013, 8:16 p.m. |
| Number Sequence — Part 3 | 100 | Dec. 29, 2013, 7:08 p.m. |
| Number Sequence — Part 4 | 100 | Dec. 29, 2013, 6:20 p.m. |
| Original Caesar Cipher | 100 | Dec. 29, 2013, 9 a.m. |
| Beaver Code | 100 | Dec. 29, 2013, 12:01 a.m. |
| Caesar Encryption | 100 | Dec. 28, 2013, 11:40 p.m. |
| Number Sequence — Part 2 | 100 | Dec. 28, 2013, 11:26 p.m. |
| Number Sequence | 100 | Dec. 28, 2013, 11:13 p.m. |