| Advent-Challenge — Part 2 | 1,106 | Jan. 25, 2022, 1:42 p.m. |
| The Book Code: A Challenge for Bookworms | 100 | Jan. 24, 2022, 5:02 p.m. |
| Advent-Challenge — Part 1 | 100 | Jan. 24, 2022, 2:17 p.m. |
| Number Sequence — Part 5 | 100 | Jan. 15, 2022, 12:52 a.m. |
| Number Sequence — Part 4 | 100 | Jan. 15, 2022, 12:04 a.m. |
| Number Sequence — Part 3 | 100 | Jan. 14, 2022, 10:55 p.m. |
| Polyhomophonic Substitution — Part 1 | 100 | Jan. 7, 2022, 12:35 p.m. |
| Image Noise | 100 | Dec. 26, 2021, 12:43 a.m. |
| Cryptanalysis Hacking Puzzles — Part 2 | 100 | Dec. 25, 2021, 11:37 p.m. |
| Cryptanalysis Hacking Puzzles — Part 1 | 100 | Dec. 25, 2021, 9:18 p.m. |
| ECDH-Key Exchange for Beginners | 100 | Dec. 23, 2021, 5:47 p.m. |
| How do you become a big cryptographer? | 100 | Dec. 19, 2021, 12:01 a.m. |
| Lightweight Introduction to Lattices — Part 2 | 100 | Dec. 12, 2021, 10:45 p.m. |
| Lightweight Introduction to Lattices — Part 1 | 100 | Dec. 11, 2021, 11:26 p.m. |
| Wheatstone Cryptograph — Part 1 | 100 | Dec. 8, 2021, 11:36 a.m. |