| Date | User | Challenge | Score |
| Neutr0nys | Finding Flags | 2 | |
| HamsterLegends | Extended GCD | 20 | |
| Usogui | Finding Flags | 2 | |
| hakka52 | Structure of AES | 15 | |
| Thaimeo2006 | Non-Interactive | 35 | |
| hakka52 | Resisting Bruteforce | 10 | |
| D4em0n | XOR Starter | 10 | |
| Chaosdragon789 | Keyed Permutations | 5 | |
| hakka52 | Keyed Permutations | 5 | |
| VuDuong | XOR Starter | 10 | |
| Chaosdragon789 | Modular Binomials | 80 | |
| znur | Adrien's Signs | 80 | |
| DarkinCypher | You either know, XOR you don't | 30 | |
| sheina906 | Blinding Light | 120 | |
| Next0202 | XOR Properties | 15 | |
| caretaker0 | Background Reading | 5 | |
| caretaker0 | Keyed Permutations | 5 | |
| VuDuong | Bytes and Big Integers | 10 | |
| VuDuong | Base64 | 10 | |
| VuDuong | Hex | 5 | |
| DarkinCypher | Favourite byte | 20 | |
| D4em0n | Bytes and Big Integers | 10 | |
| Cryptocool | Mister Saplin's Preview | 80 | |
| VuDuong | ASCII | 5 | |
| sheina906 | Signing Server | 60 | |
| VuDuong | Great Snakes | 3 | |
| sheina906 | Endless Emails | 150 | |
| VuDuong | Finding Flags | 2 | |
| Jukain16 | Base64 | 10 | |
| Jukain16 | Hex | 5 | |
| DarkinCypher | XOR Properties | 15 | |
| josephcmac | Bringing It All Together | 50 | |
| sheina906 | Everything is Still Big | 100 | |
| Jukain16 | ASCII | 5 | |
| Brik_12 | Chinese Remainder Theorem | 40 | |
| kanellam | Generators of Groups | 20 | |
| Jukain16 | Great Snakes | 3 | |
| minshay | RSA or HMAC? | 35 | |
| Brik_12 | Modular Square Root | 35 | |
| GingerCarrot | An Exceptional Twisted Mind | 125 | |
| rondon | Base64 | 10 | |
| adogwithnoenemy | Modular Inverting | 25 | |
| rondon | Hex | 5 | |
| rondon | ASCII | 5 | |
| Matsuda | Extended GCD | 20 | |
| mrbdj | Great Snakes | 3 | |
| rondon | Great Snakes | 3 | |
| mrbdj | Finding Flags | 2 | |
| rondon | Finding Flags | 2 | |
| adogwithnoenemy | Modular Arithmetic 2 | 20 |
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