| Date | User | Challenge | Score |
| 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 | |
| combobulat | Base64 | 10 | |
| useless | Chinese Remainder Theorem | 40 | |
| bjoraz | ASCII | 5 | |
| gaoyashuiqiang | Keyed Permutations | 5 | |
| bjoraz | Great Snakes | 3 | |
| combobulat | Hex | 5 | |
| combobulat | ASCII | 5 | |
| combobulat | Great Snakes | 3 | |
| chungungo | You either know, XOR you don't | 30 | |
| bjoraz | Finding Flags | 2 | |
| jcesar | Great Snakes | 3 | |
| combobulat | Finding Flags | 2 | |
| jcesar | Finding Flags | 2 | |
| GeorgeSor | Confusion through Substitution | 25 | |
| teck | Greatest Common Divisor | 15 | |
| yasmeeeen | ASCII | 5 | |
| GeorgeSor | Round Keys | 20 | |
| yasmeeeen | Great Snakes | 3 | |
| Ah_Crypto2 | You either know, XOR you don't | 30 | |
| Ah_Crypto2 | Favourite byte | 20 | |
| Ah_Crypto2 | XOR Properties | 15 | |
| Ah_Crypto2 | XOR Starter | 10 | |
| yasmeeeen | Finding Flags | 2 | |
| Ah_Crypto2 | Bytes and Big Integers | 10 | |
| Ah_Crypto2 | Base64 | 10 | |
| Ah_Crypto2 | Hex | 5 | |
| Ah_Crypto2 | Great Snakes | 3 | |
| Ah_Crypto2 | ASCII | 5 | |
| Ah_Crypto2 | Finding Flags | 2 | |
| PanagiotaTr | SSH Keys | 35 | |
| GeorgeSor | Structure of AES | 15 | |
| Kaguai | Structure of AES | 15 |
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