| Date | User | Challenge | Score |
| rsshiva403 | Base64 | 10 | |
| iBreathCesar44vC | Sharks on the Wire | 10 | |
| drakos | Quadratic Residues | 25 | |
| sontesch | Legendre Symbol | 35 | |
| iBreathCesar44vC | Secure Protocols | 5 | |
| ash2007 | XOR Properties | 15 | |
| rsshiva403 | Hex | 5 | |
| rsshiva403 | ASCII | 5 | |
| osmanaydur | Network Attacks | 5 | |
| LFM023 | You either know, XOR you don't | 30 | |
| mboh2 | Endless Emails | 150 | |
| osmanaydur | Great Snakes | 3 | |
| LFM023 | Favourite byte | 20 | |
| rsshiva403 | Network Attacks | 5 | |
| CMUNENE | Base64 | 10 | |
| duckpancakes | Passwords as Keys | 50 | |
| ash2007 | XOR Starter | 10 | |
| ATTLAS | You either know, XOR you don't | 30 | |
| 0xabouzied | Bytes and Big Integers | 10 | |
| hata | Armory | 100 | |
| ATTLAS | Favourite byte | 20 | |
| DrCryAtt | You either know, XOR you don't | 30 | |
| qW4Rp | Base64 | 10 | |
| boboyaga | Keyed Permutations | 5 | |
| qW4Rp | Hex | 5 | |
| sjvvvv | Private Keys | 20 | |
| sjvvvv | Euler's Totient | 20 | |
| Rezq | XOR Starter | 10 | |
| osmanaydur | Finding Flags | 2 | |
| qW4Rp | ASCII | 5 | |
| qW4Rp | Great Snakes | 3 | |
| mysterychan113 | XOR Starter | 10 | |
| boboyaga | Modular Arithmetic 1 | 20 | |
| mysterychan113 | Bytes and Big Integers | 10 | |
| Rezq | Hex | 5 | |
| duckpancakes | Modes of Operation Starter | 15 | |
| shutursk | Finding Flags | 2 | |
| MrDn139 | Bytes and Big Integers | 10 | |
| qW4Rp | Finding Flags | 2 | |
| tiny_mammoth | You either know, XOR you don't | 30 | |
| mysterychan113 | Base64 | 10 | |
| sontesch | Quadratic Residues | 25 | |
| ButterflyEsophag | Bytes and Big Integers | 10 | |
| deltaonetrooper | Bytes and Big Integers | 10 | |
| dexter_nate27 | Square Eyes | 35 | |
| CMUNENE | Hex | 5 | |
| CMUNENE | ASCII | 5 | |
| MrDn139 | Base64 | 10 | |
| mysterychan113 | Hex | 5 | |
| GLinZhaiu | Finding Flags | 2 |
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