| Enigma Part 2 | 1,105 | Jan. 18, 2015, 12:21 a.m. |
| Enigma Part 1 | 1,105 | Jan. 18, 2015, 12:02 a.m. |
| Hybrid Encryption I | 1,105 | Jan. 17, 2015, 10:36 p.m. |
| Not-so-Secret Message from Malawi — Part I (RSA) | 1,105 | Jan. 15, 2015, 7:58 p.m. |
| RSA: Two different keys — same ciphertext | 1,111 | Jan. 13, 2015, 1:15 a.m. |
| Broadcasting and low exponent — RSA Attack | 1,111 | Jan. 12, 2015, 10:36 p.m. |
| Alice's Birthday Party (Part 2) | 1,105 | Jan. 10, 2015, 4:19 p.m. |
| Alice's Birthday Party (Part 1) | 1,105 | Jan. 7, 2015, 12:21 a.m. |
| Reserve Hand Procedure — Part 1 | 100 | Jan. 6, 2015, 8:37 p.m. |
| How do you become a big cryptographer? | 100 | Jan. 6, 2015, 3:21 p.m. |
| Factorization Cipher — Part 2 | 1,114 | Jan. 6, 2015, 1:24 a.m. |
| Snow White and the seven dwarfs | 100 | Jan. 5, 2015, 11:43 a.m. |
| Factorization Cipher — Part 1 | 100 | Jan. 5, 2015, 10:14 a.m. |
| Cracking SHA1-Hashed Passwords | 1,108 | Jan. 5, 2015, 7:35 a.m. |
| Letter to the Templars — Part 3 | 1,125 | Jan. 5, 2015, 2:15 a.m. |
| Letter to the Templars — Part 2 | 100 | Jan. 5, 2015, 2:03 a.m. |
| Letter to the Templars — Part 1 | 100 | Jan. 5, 2015, 1:55 a.m. |
| Monoalphabetic Substitution | 100 | Jan. 5, 2015, 12:20 a.m. |