| Broadcasting and low exponent — RSA Attack | 1,130 | July 12, 2013, 11:39 p.m. |
| RSA: Two different keys — same ciphertext | 1,131 | July 12, 2013, 9:03 p.m. |
| Smartcard RSA | 1,204 | March 24, 2011, 12:45 p.m. |
| Not-so-Secret Message from Malawi — Part I (RSA) | 1,201 | March 21, 2011, 3:16 p.m. |
| Lattice Part 1 | 1,523 | March 18, 2011, 7:21 p.m. |
| CMEA 2 | 15,101 | March 15, 2011, 8:30 p.m. |
| CMEA 1 | 1,231 | March 15, 2011, 12:16 a.m. |
| Enigma Part 1 | 1,208 | March 3, 2011, 11:50 p.m. |
| Not-so-Secret Message from Malawi — Part II (ECC) | 1,209 | March 2, 2011, 1:51 a.m. |
| ORYX Stream Cipher Part II | 1,215 | Feb. 16, 2011, 11:30 p.m. |
| ORYX Stream Cipher Part I | 1,215 | Feb. 16, 2011, 10:20 p.m. |
| Alice's Birthday Party (Part 1) | 1,222 | Feb. 3, 2011, 8:19 p.m. |
| Alice's Birthday Party (Part 2) | 1,229 | Jan. 25, 2011, 3:04 a.m. |
| Monoalphabetic Substitution | 101 | Jan. 7, 2011, 6:33 p.m. |