| Snow White and the seven dwarfs | 100 | Feb. 18, 2015, 2:40 p.m. |
| RSA: Two different keys — same ciphertext | 1,110 | Feb. 12, 2015, 10:02 p.m. |
| Cracking SHA1-Hashed Passwords | 1,108 | Feb. 9, 2015, 1:11 a.m. |
| Not-so-Secret Message from Malawi — Part I (RSA) | 1,104 | Feb. 8, 2015, 6:59 p.m. |
| Broadcasting and low exponent — RSA Attack | 1,110 | Feb. 3, 2015, 12:12 a.m. |
| Alice's Birthday Party (Part 2) | 1,104 | Jan. 31, 2015, 1:09 a.m. |
| Alice's Birthday Party (Part 1) | 1,111 | March 2, 2014, 1:03 a.m. |
| Factorization Cipher — Part 2 | 1,126 | Feb. 15, 2014, 2:57 a.m. |
| Letter to the Templars — Part 3 | 1,144 | Feb. 15, 2014, 2:55 a.m. |
| Affine Codes / Modulo Arithmetic with N / Extended Euclid | 100 | Jan. 10, 2014, 12:27 a.m. |
| Letter to the Templars — Part 2 | 100 | Jan. 8, 2014, 1:49 a.m. |
| Letter to the Templars — Part 1 | 100 | Jan. 7, 2014, 10:30 p.m. |
| Factorization Cipher — Part 1 | 100 | Jan. 4, 2014, 10:15 p.m. |
| Original Caesar Cipher | 100 | Dec. 31, 2013, 11:57 p.m. |
| Number Sequence | 100 | Dec. 31, 2013, 10:19 p.m. |