| ORYX Stream Cipher — Part 3 (revised) | 1,124 | Oct. 6, 2015, 2:59 p.m. |
| ORYX Stream Cipher Part II | 1,100 | Oct. 4, 2015, 12:07 p.m. |
| ORYX Stream Cipher Part I | 1,100 | Oct. 3, 2015, 10:50 a.m. |
| Letter to the Templars — Part 3 | 1,116 | Sept. 27, 2015, 5:21 p.m. |
| Letter to the Templars — Part 2 | 100 | Sept. 27, 2015, 5:18 p.m. |
| Letter to the Templars — Part 1 | 100 | Sept. 27, 2015, 5:15 p.m. |
| Number Sequence — Part 8 | 108 | Sept. 26, 2015, 6:04 a.m. |
| Unconcealed RSA messages | 1,202 | April 5, 2012, 10:06 a.m. |
| A really long number sequence | 1,185 | April 3, 2012, 3:26 p.m. |
| Factorization Cipher — Part 2 | 1,221 | March 26, 2012, 4:48 p.m. |
| Factorization Cipher — Part 3 | 1,256 | March 16, 2012, 5:04 p.m. |
| Partial Key Exposure with RSA — Part 1 | 1,398 | Feb. 28, 2012, 4:17 p.m. |
| Not-so-Secret Message from Malawi — Part I (RSA) | 1,145 | Feb. 16, 2012, 10:30 a.m. |
| Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1 | 100 | Feb. 14, 2012, 4:09 p.m. |
| Number Sequence — Part 2 | 100 | Feb. 14, 2012, 4:07 p.m. |
| Number Sequence | 100 | Feb. 14, 2012, 4:02 p.m. |
| Alice's Birthday Party (Part 2) | 1,145 | Feb. 13, 2012, 5:18 p.m. |
| Alice's Birthday Party (Part 1) | 1,145 | Feb. 13, 2012, 4:13 p.m. |
| Factorization Cipher — Part 1 | 101 | Feb. 1, 2012, 4:01 p.m. |
| Original Caesar Cipher | 100 | Jan. 31, 2012, 3:36 p.m. |
| Monoalphabetic substitution with camouflage — Part 4 | 102 | Jan. 31, 2012, 3:34 p.m. |
| Modified Caesar Cipher | 101 | Jan. 31, 2012, 3:31 p.m. |