| Alice's Birthday Party (Part 1) | 1,081 | June 24, 2021, 11:01 a.m. |
| Heartbleed — Part 3 | 1,092 | June 24, 2021, 10:57 a.m. |
| Original Caesar Cipher | 100 | June 24, 2021, 10:37 a.m. |
| Number Sequence — Part 2 | 100 | June 24, 2021, 10:27 a.m. |
| Number Sequence | 100 | June 24, 2021, 10:23 a.m. |
| Beaver Code | 100 | June 24, 2021, 10:17 a.m. |
| Cryptanalysis Hacking Puzzles — Part 2 | 100 | June 24, 2021, 9:42 a.m. |
| Alice's Birthday Party (Part 2) | 1,081 | June 24, 2021, 9:38 a.m. |
| Letter to the Templars — Part 3 | 1,086 | June 24, 2021, 9:26 a.m. |
| Letter to the Templars — Part 2 | 100 | June 24, 2021, 8:59 a.m. |
| Letter to the Templars — Part 1 | 100 | June 24, 2021, 8:58 a.m. |
| Broadcasting and low exponent — RSA Attack | 1,083 | June 24, 2021, 8:49 a.m. |
| Cracking SHA1-Hashed Passwords | 1,082 | June 16, 2021, 1:38 p.m. |