| Date | User | Challenge | Score |
| Mazenassiment | Greatest Common Divisor | 15 | |
| TeaQuicky | Working with Fields | 10 | |
| TeaQuicky | Modulus Inutilis | 50 | |
| TeaQuicky | Salty | 20 | |
| itg6j | Greatest Common Divisor | 15 | |
| Amro_Hussein | Modular Square Root | 35 | |
| Mazenassiment | You either know, XOR you don't | 30 | |
| Mazenassiment | Favourite byte | 20 | |
| Mazenassiment | XOR Properties | 15 | |
| Mazenassiment | XOR Starter | 10 | |
| Mazenassiment | Bytes and Big Integers | 10 | |
| Amani | Modes of Operation Starter | 15 | |
| WertherSamsa | Lemur XOR | 40 | |
| Mazenassiment | Base64 | 10 | |
| Amro_Hussein | Legendre Symbol | 35 | |
| Amani | Bringing It All Together | 50 | |
| Mazenassiment | Hex | 5 | |
| Mazenassiment | ASCII | 5 | |
| Mazenassiment | Great Snakes | 3 | |
| Amani | Diffusion through Permutation | 30 | |
| Mazenassiment | Finding Flags | 2 | |
| Amani | Confusion through Substitution | 25 | |
| Amani | Round Keys | 20 | |
| Amani | Structure of AES | 15 | |
| Amani | Resisting Bruteforce | 10 | |
| Amani | Keyed Permutations | 5 | |
| l3th4l | Signing Server | 60 | |
| bl4ckm0re | You either know, XOR you don't | 30 | |
| Amani | Modular Binomials | 80 | |
| b1b00www | JSON in JSON | 40 | |
| yy8ay | RSA Signatures | 25 | |
| bl4ckm0re | Favourite byte | 20 | |
| _Hiram009 | Finding Flags | 2 | |
| mercuryseries | Favourite byte | 20 | |
| bl4ckm0re | XOR Properties | 15 | |
| ds0xxd3r | Efficient Exchange | 50 | |
| l3th4l | Null or Never | 100 | |
| MahmoodTavafoghi | Modular Square Root | 35 | |
| VicNjugush | Finding Flags | 2 | |
| ox1bx | JSON in JSON | 40 | |
| aravhacks | Extended GCD | 20 | |
| Amro_Hussein | Quadratic Residues | 25 | |
| HighestClimber | Public Keys | 15 | |
| lingling | Square Eyes | 35 | |
| Amani | Adrien's Signs | 80 | |
| lingling | Inferius Prime | 30 | |
| Amani | Chinese Remainder Theorem | 40 | |
| Amani | Modular Square Root | 35 | |
| Amani | Legendre Symbol | 35 | |
| kurumi_11 | Diffusion through Permutation | 30 |
You are now level Current level