| Unusual encryption using a diophantine equation | 1,082 | March 14, 2022, 12:52 a.m. |
| Advent-Challenge — Part 2 | 1,107 | Nov. 21, 2021, 2:22 a.m. |
| Advent Challenge — Part 3 | 1,107 | Nov. 21, 2021, 1:33 a.m. |
| AES ECB Wrong Encoding | 1,107 | Nov. 21, 2021, 1:10 a.m. |
| Summer Job | 1,111 | Nov. 19, 2021, 10:11 p.m. |
| Lightweight Introduction to Lattices — Part 3 | 1,144 | Nov. 19, 2021, 6:19 a.m. |
| Lightweight Introduction to Lattices — Part 2 | 100 | Nov. 19, 2021, 5:59 a.m. |
| Lightweight Introduction to Lattices — Part 1 | 100 | Nov. 19, 2021, 5:18 a.m. |
| ADFGVX — Part 2 | 100 | Dec. 31, 2018, 9:19 p.m. |
| ADFGVX — Part 1 | 100 | Dec. 31, 2018, 9:07 p.m. |
| Kaskade-S/T — Part 1 | 100 | Nov. 2, 2018, 6:30 a.m. |
| Number Sequence — Part 10 | 101 | Oct. 10, 2018, 3:40 a.m. |
| Trendy Messenger | 1,218 | Oct. 10, 2018, 3:19 a.m. |
| Image Noise | 100 | Oct. 8, 2018, 4:24 a.m. |
| Advent-Challenge — Part 1 | 100 | Oct. 8, 2018, 3:07 a.m. |
| Autokey Cipher | 108 | Oct. 8, 2018, 3:03 a.m. |
| Enigma Messages with Repeated Letters — Part 5 | 100 | Dec. 16, 2016, 12:05 a.m. |
| Enigma Messages with Repeated Letters — Part 4 | 100 | Dec. 16, 2016, 12:01 a.m. |
| Enigma Messages with Repeated Letters — Part 3 | 100 | Dec. 15, 2016, 11:35 p.m. |
| Enigma Messages with Repeated Letters — Part 2 | 100 | Dec. 15, 2016, 11:06 p.m. |
| ORYX Stream Cipher — Part 4a | 1,119 | Dec. 10, 2016, 5:57 p.m. |
| Heartbleed — Part 1 | 100 | Dec. 2, 2016, 5:55 a.m. |
| Heartbleed — Part 2 | 100 | Dec. 2, 2016, 5:44 a.m. |
| CMEA 2 | 13,304 | Nov. 30, 2016, 10:01 a.m. |
| CMEA 1 | 1,095 | Nov. 30, 2016, 8:06 a.m. |
| From Russia with Love | 100 | Nov. 19, 2016, 11:01 a.m. |
| Enigma Part 1 | 1,096 | July 7, 2016, 9:02 p.m. |
| Snow White and the seven dwarfs | 100 | June 13, 2016, 9:49 p.m. |
| ORYX Stream Cipher Part II | 1,101 | Sept. 10, 2015, 8:38 p.m. |
| ORYX Stream Cipher — Part 3 (revised) | 1,125 | Aug. 28, 2015, 8:04 p.m. |
| Partial Key Exposure with RSA — Part 1 | 1,110 | Aug. 27, 2015, 6:37 p.m. |
| Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1 | 100 | Aug. 21, 2015, 4:56 a.m. |
| Monoalphabetic substitution with camouflage — Part 1 | 100 | Aug. 21, 2015, 3:30 a.m. |
| Grille Cipher | 100 | Aug. 17, 2015, 11:08 p.m. |
| RSA: Two different keys — same ciphertext | 1,106 | Aug. 17, 2015, 10:33 p.m. |
| Monoalphabetic Substitution | 100 | Aug. 15, 2015, 2:48 a.m. |
| Broadcasting and low exponent — RSA Attack | 1,106 | July 27, 2015, 8:21 p.m. |
| Smartcard RSA | 1,103 | April 19, 2015, 7:48 p.m. |
| ECDH-Key Exchange for Beginners | 100 | Jan. 23, 2015, 12:32 a.m. |
| M-138 — Part 2 | 1,341 | Jan. 21, 2015, 8:38 p.m. |
| M-138 — Part 1 | 103 | Jan. 21, 2015, 7:05 p.m. |
| Not-so-Secret Message from Malawi — Part I (RSA) | 1,106 | Nov. 19, 2014, 2:45 a.m. |
| Affine Codes / Modulo Arithmetic with N / Extended Euclid | 100 | Nov. 15, 2014, 12:24 a.m. |
| Hybrid Encryption I | 1,106 | Nov. 14, 2014, 11:08 p.m. |
| Unconcealed RSA messages | 1,115 | Nov. 13, 2014, 9:30 p.m. |
| A modified homophonic cipher with reduced alphabets — Part 2 | 100 | Nov. 11, 2014, 8:09 p.m. |
| BCR code (Book-Caesar-RSA) | 1,126 | Nov. 11, 2014, 8:13 a.m. |
| Alice's Birthday Party (Part 2) | 1,106 | Nov. 11, 2014, 3:42 a.m. |
| One-Time Pad with Flaws | 100 | Nov. 10, 2014, 10:33 a.m. |
| Alice's Birthday Party (Part 1) | 1,106 | Nov. 10, 2014, 8:32 a.m. |
| RSA Factoring Challenge: RSA-210 | 0 | Nov. 1, 2014, 8:49 p.m. |
| RSA Factoring Challenge: RSA-704 | 0 | Nov. 1, 2014, 8:47 p.m. |
| Modified Caesar Cipher | 100 | Oct. 11, 2014, 6:56 a.m. |
| Brute-Force-Attack on Triple-DES with Reduced Key Space | 1,108 | July 23, 2014, 2:48 a.m. |
| Enigma Messages with Repeated Letters — Part 1 | 100 | July 22, 2014, 11:04 p.m. |
| ORYX Stream Cipher Part I | 1,109 | May 24, 2014, 7:40 p.m. |
| Cracking SHA1-Hashed Passwords | 1,114 | May 24, 2014, 3:43 p.m. |
| Number Sequence — Part 2 | 100 | May 24, 2014, 12:26 p.m. |
| Factorization Cipher — Part 1 | 100 | May 24, 2014, 12:20 p.m. |
| Number Sequence — Part 4 | 100 | May 24, 2014, 12:19 p.m. |
| Letter to the Templars — Part 2 | 100 | May 16, 2013, 6:21 a.m. |
| Beaver Code | 100 | May 16, 2013, 6:13 a.m. |
| A hidden word | 101 | May 16, 2013, 5:53 a.m. |
| Letter to the Templars — Part 3 | 1,183 | May 16, 2013, 5:41 a.m. |
| A modified homophonic cipher with reduced alphabets — Part 1 | 100 | May 16, 2013, 5:02 a.m. |
| Letter to the Templars — Part 1 | 100 | May 16, 2013, 4:45 a.m. |
| Number Sequence — Part 3 | 100 | May 16, 2013, 4:29 a.m. |
| Caesar Encryption | 100 | May 16, 2013, 1:52 a.m. |
| Original Caesar Cipher | 100 | May 16, 2013, 1:31 a.m. |
| Number Sequence | 100 | May 16, 2013, 1:29 a.m. |