| Date | User | Challenge | Score |
| mochaowo | Endless Emails | 150 | |
| Tsing_summer | Computing Public Values | 25 | |
| Irsyad_Afla | Diffusion through Permutation | 30 | |
| sejin | Hex | 5 | |
| wangfu | SSH Keys | 35 | |
| Irsyad_Afla | Confusion through Substitution | 25 | |
| Emma2266 | Great Snakes | 3 | |
| Irsyad_Afla | Round Keys | 20 | |
| Tsing_summer | Generators of Groups | 20 | |
| Tsing_summer | Working with Fields | 10 | |
| TheLPSC | Legendre Symbol | 35 | |
| Irsyad_Afla | Structure of AES | 15 | |
| Emma2266 | Finding Flags | 2 | |
| KyleLee | Structure of AES | 15 | |
| Tsing_summer | Modulus Inutilis | 50 | |
| Irsyad_Afla | Keyed Permutations | 5 | |
| mavil27 | Forbidden Fruit | 150 | |
| DarkinCypher | Round Keys | 20 | |
| HarabagiuRobert | Structure of AES | 15 | |
| Aleena10111 | Jack's Birthday Hash | 20 | |
| Irsyad_Afla | ECB Oracle | 60 | |
| sion4496 | Extended GCD | 20 | |
| Irsyad_Afla | ECB CBC WTF | 55 | |
| jimun | Greatest Common Divisor | 15 | |
| PatoDoronDad | Bean Counter | 60 | |
| Irsyad_Afla | Flipping Cookie | 60 | |
| KyleLee | Resisting Bruteforce | 10 | |
| Tsing_summer | Salty | 20 | |
| Dessert | Marin's Secrets | 50 | |
| PatoDoronDad | Symmetry | 50 | |
| SoonOOv | Adrien's Signs | 80 | |
| KyleLee | Keyed Permutations | 5 | |
| Tsing_summer | Manyprime | 40 | |
| akbar7 | Flipping Cookie | 60 | |
| mariotronix | Efficient Exchange | 50 | |
| TheLPSC | Quadratic Residues | 25 | |
| akbar7 | ECB CBC WTF | 55 | |
| Kiixzoo | ECB Oracle | 60 | |
| PatoDoronDad | ECB CBC WTF | 55 | |
| JoeNgala | You either know, XOR you don't | 30 | |
| JoeNgala | Favourite byte | 20 | |
| MonkeyRoot | ProSign 3 | 100 | |
| JoeNgala | XOR Properties | 15 | |
| mochaowo | Crossed Wires | 100 | |
| traktor | Confusion through Substitution | 25 | |
| sejin | ASCII | 5 | |
| PatoDoronDad | Flipping Cookie | 60 | |
| PatoDoronDad | ECB Oracle | 60 | |
| sejin | Great Snakes | 3 | |
| JoeNgala | XOR Starter | 10 |
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