| Date | User | Challenge | Score |
| zhubat | Modulus Inutilis | 50 | |
| Zaya | Great Snakes | 3 | |
| Zaya | Finding Flags | 2 | |
| SAATVIK | Point Negation | 10 | |
| shshshshsh888 | Great Snakes | 3 | |
| shshshshsh888 | Finding Flags | 2 | |
| mamun30cse | Modular Exponentiation | 10 | |
| mamun30cse | Bean Counter | 60 | |
| mamun30cse | Symmetry | 50 | |
| mamun30cse | Flipping Cookie | 60 | |
| mamun30cse | ECB CBC WTF | 55 | |
| mamun30cse | ECB Oracle | 60 | |
| zhubat | Salty | 20 | |
| mamun30cse | Passwords as Keys | 50 | |
| syncrain | XOR Starter | 10 | |
| mamun30cse | Modes of Operation Starter | 15 | |
| mamun30cse | Bringing It All Together | 50 | |
| ZoeB | Finding Flags | 2 | |
| Tona | Finding Flags | 2 | |
| CyeRanz | Base64 | 10 | |
| syncrain | Encoding Challenge | 40 | |
| mamun30cse | Diffusion through Permutation | 30 | |
| mamun30cse | Confusion through Substitution | 25 | |
| Adrinn | Modular Inverting | 25 | |
| mamun30cse | Round Keys | 20 | |
| yuzu | XOR Properties | 15 | |
| Adrinn | Modular Arithmetic 2 | 20 | |
| mamun30cse | Structure of AES | 15 | |
| mamun30cse | Resisting Bruteforce | 10 | |
| mamun30cse | Keyed Permutations | 5 | |
| juanp22007 | Hex | 5 | |
| mamun30cse | You either know, XOR you don't | 30 | |
| mamun30cse | Favourite byte | 20 | |
| mamun30cse | XOR Properties | 15 | |
| mamun30cse | XOR Starter | 10 | |
| DavidTruong | Proofs of Knowledge | 20 | |
| lunkes | Adrien's Signs | 80 | |
| juanp22007 | ASCII | 5 | |
| yuanjuncai | Base64 | 10 | |
| Junezq | Modular Arithmetic 1 | 20 | |
| MyWolve | Round Keys | 20 | |
| yuanjuncai | Hex | 5 | |
| juanp22007 | Great Snakes | 3 | |
| yuanjuncai | ASCII | 5 | |
| KMA_SiriuS_ | Network Attacks | 5 | |
| kareem_abousheta | ASCII | 5 | |
| Junezq | Extended GCD | 20 | |
| yuzu | XOR Starter | 10 | |
| yuanjuncai | Great Snakes | 3 | |
| lunkes | Chinese Remainder Theorem | 40 |
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