| Date | User | Challenge | Score |
| TonyNo | Favourite byte | 20 | |
| GeorgeSor | Private Keys | 20 | |
| Djak0 | Lemur XOR | 40 | |
| GeorgeSor | Euler's Totient | 20 | |
| TonyNo | XOR Properties | 15 | |
| TonyNo | XOR Starter | 10 | |
| GeorgeSor | Public Keys | 15 | |
| TonyNo | Bytes and Big Integers | 10 | |
| Gondowt | CTRIME | 70 | |
| tomjab | Moving Problems | 150 | |
| GeorgeSor | Modular Exponentiation | 10 | |
| TonyNo | Base64 | 10 | |
| TonyNo | Hex | 5 | |
| TonyNo | ASCII | 5 | |
| kanellam | Great Snakes | 3 | |
| kanellam | Finding Flags | 2 | |
| TonyNo | Modular Binomials | 80 | |
| gorogoro | Script Kiddie | 70 | |
| nomaisthere | Bytes and Big Integers | 10 | |
| WallaceWiggles51 | ASCII | 5 | |
| ggerod | Prime and Prejudice | 200 | |
| CyberSyndrome | Introduction to Isogenies | 10 | |
| gorogoro | Static Client 2 | 120 | |
| solenef | ASCII | 5 | |
| PanagiotaTr | Computing Shared Secrets | 30 | |
| aa2166 | XOR Starter | 10 | |
| PanagiotaTr | Computing Public Values | 25 | |
| c4570R | ASCII | 5 | |
| aa2166 | Bytes and Big Integers | 10 | |
| PanagiotaTr | Generators of Groups | 20 | |
| c4570R | Great Snakes | 3 | |
| PanagiotaTr | Working with Fields | 10 | |
| mh474 | Script Kiddie | 70 | |
| shaked_srabstein | Deriving Symmetric Keys | 40 | |
| c4570R | Finding Flags | 2 | |
| pin3apple07 | Smooth Criminal | 60 | |
| CyberSyndrome | The j-invariant | 20 | |
| shaked_srabstein | Parameter Injection | 60 | |
| mypalpal | Gaussian Reduction | 50 | |
| snowman_am2 | Adrien's Signs | 80 | |
| mh474 | CTRIME | 70 | |
| mh474 | Stream of Consciousness | 80 | |
| ism | Base64 | 10 | |
| Kry0g3r | Modular Binomials | 80 | |
| mh474 | Bean Counter | 60 | |
| yyoma | Bytes and Big Integers | 10 | |
| mh474 | Symmetry | 50 | |
| mh474 | Triple DES | 60 | |
| mh474 | Lazy CBC | 60 | |
| mh474 | Flipping Cookie | 60 |
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