| Date | User | Challenge | Score |
| TeakH064 | XOR Properties | 15 | |
| Wallaby38 | Generators of Groups | 20 | |
| peekaboo123 | ASCII | 5 | |
| hasuke | Modular Binomials | 80 | |
| ttttttt | Modular Arithmetic 2 | 20 | |
| Moka | ASCII | 5 | |
| Wallaby38 | Working with Fields | 10 | |
| peekaboo123 | Great Snakes | 3 | |
| peekaboo123 | Finding Flags | 2 | |
| Moka | Great Snakes | 3 | |
| Moka | Finding Flags | 2 | |
| ttttttt | Modular Arithmetic 1 | 20 | |
| WarSpore | Triple DES | 60 | |
| BakerPh0nk | Bytes and Big Integers | 10 | |
| ub_krypto_25_01 | Working with Fields | 10 | |
| ks1a | Finding Flags | 2 | |
| Kanad3 | Vectors | 10 | |
| s4lmon | Let's Decrypt Again | 175 | |
| TeakH064 | XOR Starter | 10 | |
| BakerPh0nk | Base64 | 10 | |
| curWarbler | XOR Starter | 10 | |
| ttttttt | Extended GCD | 20 | |
| BakerPh0nk | Hex | 5 | |
| BakerPh0nk | ASCII | 5 | |
| curWarbler | Bytes and Big Integers | 10 | |
| Mita | Extended GCD | 20 | |
| toto123456 | Let's Decrypt | 80 | |
| ttttttt | Greatest Common Divisor | 15 | |
| solidus | No Difference | 175 | |
| BakerPh0nk | Great Snakes | 3 | |
| adidona | Resisting Bruteforce | 10 | |
| BakerPh0nk | Finding Flags | 2 | |
| curWarbler | Base64 | 10 | |
| adidona | Keyed Permutations | 5 | |
| TeakH064 | Bytes and Big Integers | 10 | |
| TeakH064 | Base64 | 10 | |
| TeakH064 | Hex | 5 | |
| curWarbler | Hex | 5 | |
| curWarbler | ASCII | 5 | |
| Mycr0ft | Great Snakes | 3 | |
| Mycr0ft | Finding Flags | 2 | |
| Veronika | Export-grade | 100 | |
| Kanad3 | Fast Primes | 75 | |
| TeakH064 | ASCII | 5 | |
| kara_koulouri | XOR Starter | 10 | |
| TeakH064 | Great Snakes | 3 | |
| TeakH064 | Finding Flags | 2 | |
| curWarbler | Great Snakes | 3 | |
| cyptmos | XOR Starter | 10 | |
| drnikos | Lazy CBC | 60 |
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