| Lightweight Introduction to Lattices — Part 1 | 100 | Feb. 7, 2021, 11:35 p.m. |
| Find the right route — Part 2 | 102 | Feb. 7, 2021, 10:01 p.m. |
| Find the right route — Part 1 | 101 | Feb. 7, 2021, 9:27 p.m. |
| Beaver Code | 102 | Oct. 2, 2012, 12:21 a.m. |
| Letter to the Templars — Part 2 | 102 | Oct. 2, 2012, 12:11 a.m. |
| Letter to the Templars — Part 1 | 101 | Oct. 2, 2012, 12:09 a.m. |
| ECDH-Key Exchange for Beginners | 101 | June 19, 2012, 9:50 a.m. |
| Hybrid Encryption I | 1,137 | June 19, 2012, 12:53 a.m. |
| Molehunt (Part 2/3) | 100 | June 17, 2012, 2:47 p.m. |
| Brute-Force-Attack on Triple-DES with Reduced Key Space | 1,136 | June 17, 2012, 12:07 a.m. |
| Letter from the Alleged Countess Julie von Ortenburg | 100 | June 15, 2012, 8:50 p.m. |
| ¿No Hablas Español? No problemo! | 102 | June 14, 2012, 9:35 p.m. |
| A modified homophonic cipher with reduced alphabets — Part 2 | 100 | June 14, 2012, 11:05 a.m. |
| A modified homophonic cipher with reduced alphabets — Part 1 | 100 | June 14, 2012, 10:58 a.m. |
| Not-so-Secret Message from Malawi — Part I (RSA) | 1,136 | June 14, 2012, 10:18 a.m. |
| Factorization Cipher — Part 3 | 1,200 | June 13, 2012, 7:50 p.m. |
| Pigpen with a twist — Part 1 | 100 | June 13, 2012, 3:31 p.m. |
| Affine Codes / Modulo Arithmetic with N / Extended Euclid | 100 | June 13, 2012, 2:32 p.m. |
| Monoalphabetic Substitution | 100 | June 13, 2012, 2:04 p.m. |
| Double Columnar Transposition | 100 | June 13, 2012, 12:53 p.m. |
| Factorization Cipher — Part 2 | 1,189 | June 13, 2012, 11:06 a.m. |
| Modified Caesar Cipher | 100 | June 12, 2012, 11:06 p.m. |
| One-Time Pad with Flaws | 100 | June 12, 2012, 9:27 p.m. |
| Grille Cipher | 100 | June 12, 2012, 8:44 p.m. |
| Number Sequence — Part 5 | 102 | June 12, 2012, 4:26 p.m. |
| Factorization Cipher — Part 1 | 100 | June 12, 2012, 3:28 p.m. |
| How do you become a big cryptographer? | 107 | June 12, 2012, 1:57 p.m. |
| Keyshanc — Part 2 | 1,414 | June 6, 2012, 1:55 p.m. |
| Keyshanc — Part 1 | 1,414 | June 6, 2012, 1:31 p.m. |
| Number Sequence — Part 4 | 102 | June 6, 2012, 11 a.m. |
| Number Sequence — Part 3 | 102 | June 4, 2012, 10:07 p.m. |
| Number Sequence — Part 2 | 100 | June 4, 2012, 9:42 p.m. |
| Caesar Encryption | 100 | June 4, 2012, 9:40 p.m. |
| Original Caesar Cipher | 100 | June 4, 2012, 9:34 p.m. |
| Number Sequence | 100 | June 4, 2012, 9:28 p.m. |
Gold0
Silver0
Bronze0
