| ¿No Hablas Español? No problemo! | 100 | March 13, 2019, 12:52 a.m. |
| Modified Caesar Cipher | 100 | March 12, 2019, 8:34 p.m. |
| How do you become a big cryptographer? | 100 | March 12, 2019, 5:24 p.m. |
| From Russia with Love | 100 | March 12, 2019, 4:34 p.m. |
| Alice's Birthday Party (Part 1) | 1,087 | March 11, 2019, 9:12 p.m. |
| Snow White and the seven dwarfs | 100 | March 10, 2019, 6:45 p.m. |
| RSA Factoring Challenge: RSA-704 | 0 | March 10, 2019, 2:21 a.m. |
| One-Time Pad with Flaws | 100 | March 10, 2019, 2:15 a.m. |
| A modified homophonic cipher with reduced alphabets — Part 2 | 100 | March 9, 2019, 9:09 p.m. |
| A modified homophonic cipher with reduced alphabets — Part 1 | 100 | March 9, 2019, 7:59 p.m. |
| Grille Cipher | 100 | March 9, 2019, 7:02 p.m. |
| Cracking SHA1-Hashed Passwords | 1,088 | March 9, 2019, 2:55 p.m. |
| RSA Factoring Challenge: RSA-230 | 0 | March 9, 2019, 1:11 a.m. |
| RSA Factoring Challenge: RSA-220 | 0 | March 9, 2019, 1:11 a.m. |
| RSA Factoring Challenge: RSA-210 | 0 | March 9, 2019, 1:07 a.m. |
| Factorization Cipher — Part 1 | 100 | March 8, 2019, 7:25 p.m. |
| Affine Codes / Modulo Arithmetic with N / Extended Euclid | 100 | March 8, 2019, 6:48 p.m. |
| Monoalphabetic Substitution | 100 | March 8, 2019, 5:57 p.m. |
| Letter to the Templars — Part 3 | 1,093 | March 8, 2019, 3:47 p.m. |
| Letter to the Templars — Part 2 | 100 | March 8, 2019, 3:42 p.m. |
| Letter to the Templars — Part 1 | 100 | March 8, 2019, 3:35 p.m. |
| Beaver Code | 100 | March 7, 2019, 11:38 p.m. |
| Caesar Encryption | 100 | March 7, 2019, 7:39 p.m. |
| Original Caesar Cipher | 100 | March 7, 2019, 7:17 p.m. |
| Number Sequence — Part 4 | 100 | March 6, 2019, 10:09 p.m. |
| Number Sequence — Part 3 | 100 | March 6, 2019, 10:06 p.m. |
| Number Sequence — Part 2 | 100 | March 6, 2019, 10:04 p.m. |
| Alice's Birthday Party (Part 2) | 1,087 | March 6, 2019, 12:43 a.m. |
| Number Sequence — Part 6 | 100 | March 5, 2019, 11:06 p.m. |
| Number Sequence — Part 8 | 100 | March 5, 2019, 10:55 p.m. |
| Number Sequence — Part 9 | 100 | March 5, 2019, 10:25 p.m. |
| Advent-Challenge — Part 1 | 100 | March 5, 2019, 10:19 p.m. |
| Number Sequence | 100 | March 5, 2019, 8:10 p.m. |