| Date | User | Challenge | Score |
| Jo85 | Modular Arithmetic 1 | 20 | |
| ZeP_Wolfox | XOR Starter | 10 | |
| Jo85 | Extended GCD | 20 | |
| ZeP_Wolfox | Bytes and Big Integers | 10 | |
| Ph4ntomDr3am | Hex | 5 | |
| thisnello | XOR Properties | 15 | |
| jopayoki | Successive Powers | 60 | |
| Velisar | Favourite byte | 20 | |
| Ph4ntomDr3am | ASCII | 5 | |
| Ph4ntomDr3am | Great Snakes | 3 | |
| Ph4ntomDr3am | Finding Flags | 2 | |
| Spezi1409 | Transparency | 50 | |
| srishtiray | Hex | 5 | |
| 1s0m0rph1sm | Trust Games | 150 | |
| srishtiray | ASCII | 5 | |
| srishtiray | Great Snakes | 3 | |
| srishtiray | Finding Flags | 2 | |
| V1ckey | Passwords as Keys | 50 | |
| Oliver_isanolive | Modular Inverting | 25 | |
| quantum_cracking | Euler's Totient | 20 | |
| quantum_cracking | Public Keys | 15 | |
| Aeneas7 | Secret Exponents | 60 | |
| 1s0m0rph1sm | Jeff's LFSR | 150 | |
| R0Master | Public Keys | 15 | |
| wahab | Bytes and Big Integers | 10 | |
| m0r1 | Double and Broken | 50 | |
| quantum_cracking | Modular Exponentiation | 10 | |
| Woodsman | Modular Inverting | 25 | |
| McNaugh | XOR Properties | 15 | |
| V1ckey | Modes of Operation Starter | 15 | |
| wahab | Base64 | 10 | |
| V1ckey | Bringing It All Together | 50 | |
| m0r1 | Edwards Goes Degenerate | 100 | |
| Aloutrance | Round Keys | 20 | |
| wahab | Hex | 5 | |
| trihelium | Modular Inverting | 25 | |
| trihelium | Modular Arithmetic 2 | 20 | |
| wahab | ASCII | 5 | |
| VxRabbit | Greatest Common Divisor | 15 | |
| trihelium | Modular Arithmetic 1 | 20 | |
| CKF9091919 | Finding Flags | 2 | |
| wahab | Great Snakes | 3 | |
| QRms | Chinese Remainder Theorem | 40 | |
| Rabbit89P23 | Unencryptable | 125 | |
| wahab | Finding Flags | 2 | |
| V1ckey | Diffusion through Permutation | 30 | |
| butcher | Lemur XOR | 40 | |
| Aloutrance | Structure of AES | 15 | |
| R0Master | Modular Exponentiation | 10 | |
| azan121468 | L-Win | 120 |
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