| Date | User | Challenge | Score |
| amansr01 | Quadratic Residues | 25 | |
| albeato | Factoring | 15 | |
| senku5 | Factoring | 15 | |
| dskc | You either know, XOR you don't | 30 | |
| That11thHarmonic | Find the Lattice | 100 | |
| GeorgeSor | Diffusion through Permutation | 30 | |
| bjoraz | XOR Properties | 15 | |
| teck | Quadratic Residues | 25 | |
| teck | Modular Inverting | 25 | |
| gaoyashuiqiang | Modes of Operation Starter | 15 | |
| Xpl01t3r | Transparency | 50 | |
| Xpl01t3r | Lemur XOR | 40 | |
| Xpl01t3r | CERTainly not | 30 | |
| gaoyashuiqiang | Bringing It All Together | 50 | |
| bjoraz | XOR Starter | 10 | |
| Xpl01t3r | Privacy-Enhanced Mail? | 25 | |
| ck0d | Modular Binomials | 80 | |
| Xpl01t3r | Modular Inverting | 25 | |
| Xpl01t3r | Modular Arithmetic 2 | 20 | |
| teck | Modular Arithmetic 2 | 20 | |
| Xpl01t3r | Modular Arithmetic 1 | 20 | |
| Xpl01t3r | Extended GCD | 20 | |
| Xpl01t3r | Greatest Common Divisor | 15 | |
| Vinjr | Fast Primes | 75 | |
| saltybutter | Greatest Common Divisor | 15 | |
| bjoraz | Bytes and Big Integers | 10 | |
| fibonnaci | You either know, XOR you don't | 30 | |
| fibonnaci | Favourite byte | 20 | |
| fibonnaci | XOR Properties | 15 | |
| chungungo | Modular Arithmetic 1 | 20 | |
| fibonnaci | XOR Starter | 10 | |
| chungungo | Extended GCD | 20 | |
| chungungo | Greatest Common Divisor | 15 | |
| teck | Modular Arithmetic 1 | 20 | |
| teck | Extended GCD | 20 | |
| Acnologiarch | Favourite byte | 20 | |
| SQuidled | Too Honest | 50 | |
| gaoyashuiqiang | Diffusion through Permutation | 30 | |
| slug | Fischlin Transform | 180 | |
| slug | Fischlin's Transformation (CryptoHack) | 0 | |
| Acnologiarch | XOR Properties | 15 | |
| SQuidled | Non-Interactive | 35 | |
| jackoha | Megalomaniac 3 | 120 | |
| bjoraz | Base64 | 10 | |
| combobulat | Bytes and Big Integers | 10 | |
| bjoraz | Hex | 5 | |
| gaoyashuiqiang | Confusion through Substitution | 25 | |
| gaoyashuiqiang | Round Keys | 20 | |
| gaoyashuiqiang | Structure of AES | 15 | |
| gaoyashuiqiang | Resisting Bruteforce | 10 |
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