| Date | User | Challenge | Score |
| aboj0 | Private Keys | 20 | |
| saveryyt | Great Snakes | 3 | |
| aboj0 | Euler's Totient | 20 | |
| devil__5073 | Great Snakes | 3 | |
| PolyFluorine | Passwords as Keys | 50 | |
| svenny | Euler's Totient | 20 | |
| jonas2 | Modular Arithmetic 2 | 20 | |
| moriMorri | Base64 | 10 | |
| aboj0 | Public Keys | 15 | |
| aboj0 | Modular Exponentiation | 10 | |
| heritage | Extended GCD | 20 | |
| PolyFluorine | Modes of Operation Starter | 15 | |
| devil__5073 | Finding Flags | 2 | |
| PolyFluorine | Bringing It All Together | 50 | |
| jonas2 | Modular Arithmetic 1 | 20 | |
| moriMorri | Hex | 5 | |
| cryptopro | Base64 | 10 | |
| PolyFluorine | Diffusion through Permutation | 30 | |
| Gastly | Encoding Challenge | 40 | |
| Melbackk | Greatest Common Divisor | 15 | |
| cryptopro | Hex | 5 | |
| heritage | Greatest Common Divisor | 15 | |
| Gastly | Bytes and Big Integers | 10 | |
| cryptopro | ASCII | 5 | |
| Gastly | Hex | 5 | |
| Gastly | Base64 | 10 | |
| Gastly | ASCII | 5 | |
| PolyFluorine | Confusion through Substitution | 25 | |
| Marchet_91 | SSH Keys | 35 | |
| Melbackk | You either know, XOR you don't | 30 | |
| Adrinn | Lemur XOR | 40 | |
| moriMorri | ASCII | 5 | |
| crypto_07 | Legendre Symbol | 35 | |
| cryptopro | Great Snakes | 3 | |
| tranchsanto | Couples | 100 | |
| cryptopro | Finding Flags | 2 | |
| moriMorri | Great Snakes | 3 | |
| Carz | Bytes and Big Integers | 10 | |
| salviohexia | Great Snakes | 3 | |
| KoreaMrKing | Everything is Big | 70 | |
| heritage | You either know, XOR you don't | 30 | |
| JamesDev | XOR Starter | 10 | |
| pocry43 | Point Negation | 10 | |
| zyx_z | Modular Binomials | 80 | |
| yaki3355 | Greatest Common Divisor | 15 | |
| Carz | Base64 | 10 | |
| Carz | Hex | 5 | |
| Carz | ASCII | 5 | |
| salviohexia | Finding Flags | 2 | |
| Carz | Network Attacks | 5 |
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