| Modified Caesar Cipher | 100 | Jan. 9, 2021, 10:16 p.m. |
| Monoalphabetic Substitution | 100 | Jan. 9, 2021, 6:30 p.m. |
| Image Noise | 100 | Jan. 3, 2021, 6:31 p.m. |
| Find the right route — Part 3 | 150 | Dec. 28, 2020, 3:15 p.m. |
| Find the right route — Part 2 | 111 | Dec. 28, 2020, 12:33 p.m. |
| Cryptanalysis Hacking Puzzles — Part 2 | 100 | Oct. 30, 2020, 9:42 a.m. |
| Find the right route — Part 1 | 200 | Oct. 28, 2020, 9:04 a.m. |
| One-Time Pad with Flaws | 100 | Oct. 18, 2020, 9:32 p.m. |
| Number Sequence — Part 10 | 100 | Oct. 18, 2020, 3:27 p.m. |
| Autokey Cipher | 100 | Oct. 18, 2020, 3 p.m. |
| Cascading Encryption — Part 1/3 | 100 | Jan. 23, 2018, 11:20 p.m. |
| How do you become a big cryptographer? | 100 | Jan. 21, 2018, 11:15 a.m. |
| ¿No Hablas Español? No problemo! | 100 | Jan. 20, 2018, 3:58 p.m. |
| Factorization Cipher — Part 1 | 100 | Jan. 20, 2018, 2:49 p.m. |
| An Invisible Message | 100 | Jan. 20, 2018, 2:05 p.m. |
| Number Sequence — Part 3 | 100 | Jan. 17, 2018, 10:55 p.m. |
| Reserve Hand Procedure — Part 1 | 100 | Jan. 15, 2018, 10:12 p.m. |
| Multilingual Monoalphabetic Substitution | 100 | Jan. 15, 2018, 5:55 p.m. |
| Advent-Challenge — Part 1 | 103 | Jan. 14, 2018, 3:35 p.m. |
| Letter from the Alleged Countess Julie von Ortenburg | 100 | March 29, 2016, 10:17 p.m. |
| A hidden word — Part 2 | 100 | March 28, 2016, 3:39 p.m. |
| Nils away on travel | 100 | March 28, 2016, 2:28 p.m. |
| A modified homophonic cipher with reduced alphabets — Part 1 | 100 | March 27, 2016, noon |
| A modified homophonic cipher with reduced alphabets — Part 2 | 100 | March 25, 2016, 11:24 p.m. |
| A hidden word | 100 | March 13, 2016, 8:54 p.m. |
| From Russia with Love | 100 | March 13, 2016, 8:40 p.m. |
| Letter to the Templars — Part 3 | 1,111 | March 13, 2016, 6:20 p.m. |
| Snow White and the seven dwarfs | 100 | March 13, 2016, 5:59 p.m. |
| Number Sequence — Part 4 | 100 | March 13, 2016, 4:55 p.m. |
| The Last Note | 100 | March 6, 2016, 1:19 p.m. |
| Number Sequence — Part 2 | 100 | March 2, 2016, 7:54 p.m. |
| ADFGVX — Part 2 | 100 | March 2, 2016, 7:41 p.m. |
| Grille Cipher | 100 | March 2, 2016, 6:50 p.m. |
| Enigma Messages with Repeated Letters — Part 3 | 100 | March 1, 2016, 11:46 p.m. |
| Enigma Messages with Repeated Letters — Part 1 | 100 | March 1, 2016, 9:15 p.m. |
| Letter to the Templars — Part 2 | 100 | Feb. 28, 2016, 9:16 p.m. |
| Caesar Encryption | 100 | Feb. 28, 2016, 6:39 p.m. |
| Number Sequence — Part 8 | 101 | Feb. 24, 2016, 12:27 a.m. |
| Trifid Cipher | 100 | Feb. 22, 2016, 11:18 p.m. |
| M-138 — Part 1 | 100 | Feb. 22, 2016, 8:50 p.m. |
| ADFGVX — Part 1 | 100 | Feb. 21, 2016, 11:06 p.m. |
| Beaver Code | 100 | Feb. 21, 2016, 5:36 p.m. |
| Letter to the Templars — Part 1 | 100 | Feb. 21, 2016, 5:33 p.m. |
| Original Caesar Cipher | 100 | Feb. 21, 2016, 5:27 p.m. |
| Number Sequence | 100 | Feb. 21, 2016, 5:25 p.m. |