| Broadcasting and low exponent — RSA Attack | 1,182 | Feb. 29, 2012, 3:58 p.m. |
| Alice's Birthday Party (Part 2) | 1,143 | Feb. 29, 2012, 3:14 p.m. |
| Alice's Birthday Party (Part 1) | 1,144 | Feb. 29, 2012, 3:10 a.m. |
| Factorization Cipher — Part 1 | 101 | Feb. 28, 2012, 1:06 a.m. |
| Grille Cipher | 101 | Feb. 26, 2012, 10:37 p.m. |
| ECDH-Key Exchange for Beginners | 133 | Feb. 26, 2012, 9:45 p.m. |
| Playfair Encryption | 104 | Jan. 17, 2011, 12:12 a.m. |
| A modified homophonic cipher with reduced alphabets — Part 2 | 101 | Jan. 16, 2011, 12:17 a.m. |
| A modified homophonic cipher with reduced alphabets — Part 1 | 101 | Jan. 15, 2011, 11:58 p.m. |
| Original Caesar Cipher | 103 | Jan. 15, 2011, 11:29 p.m. |
| Number Sequence | 101 | Jan. 15, 2011, 10:28 p.m. |
| Caesar Encryption | 101 | Jan. 15, 2011, 10:22 p.m. |