| Date | User | Challenge | Score |
| feynhat | Jack's Birthday Hash | 20 | |
| kurumi_11 | Point Addition | 30 | |
| darkone | Extended GCD | 20 | |
| Aws_Fahd_abdo | Modular Inverting | 25 | |
| Aws_Fahd_abdo | Modular Arithmetic 2 | 20 | |
| Aws_Fahd_abdo | Modular Arithmetic 1 | 20 | |
| Aws_Fahd_abdo | Extended GCD | 20 | |
| Aws_Fahd_abdo | Greatest Common Divisor | 15 | |
| lavi24 | Encoding Challenge | 40 | |
| Aws_Fahd_abdo | Lemur XOR | 40 | |
| Aws_Fahd_abdo | You either know, XOR you don't | 30 | |
| Aws_Fahd_abdo | Favourite byte | 20 | |
| Aws_Fahd_abdo | XOR Properties | 15 | |
| Aws_Fahd_abdo | XOR Starter | 10 | |
| Aws_Fahd_abdo | Encoding Challenge | 40 | |
| ev0l | Legendre Symbol | 35 | |
| Aws_Fahd_abdo | Bytes and Big Integers | 10 | |
| Aws_Fahd_abdo | Base64 | 10 | |
| Aws_Fahd_abdo | Hex | 5 | |
| Aws_Fahd_abdo | ASCII | 5 | |
| cyros | Stream of Consciousness | 80 | |
| cyros | CTRIME | 70 | |
| cyros | Bean Counter | 60 | |
| cyros | Symmetry | 50 | |
| Aws_Fahd_abdo | Network Attacks | 5 | |
| Aws_Fahd_abdo | Great Snakes | 3 | |
| cyros | Lazy CBC | 60 | |
| Aws_Fahd_abdo | Finding Flags | 2 | |
| cyros | Triple DES | 60 | |
| cyros | ECB Oracle | 60 | |
| Toikka | RSA Decryption | 20 | |
| random_two0 | Salty | 20 | |
| cyros | Flipping Cookie | 60 | |
| Mr_o | Ron was Wrong, Whit is Right | 90 | |
| darkone | Greatest Common Divisor | 15 | |
| MohamedMujahed | Prime and Prejudice | 200 | |
| noTun4 | Quadratic Residues | 25 | |
| bryan_escobar | You either know, XOR you don't | 30 | |
| MohamedMujahed | Real Eisenstein | 150 | |
| Toikka | Private Keys | 20 | |
| Azavia | Base64 | 10 | |
| WertherSamsa | Symmetry | 50 | |
| cyros | ECB CBC WTF | 55 | |
| bryan_escobar | Favourite byte | 20 | |
| Danyihh | XOR Starter | 10 | |
| MohamedMujahed | Cofactor Cofantasy | 150 | |
| cyros | Passwords as Keys | 50 | |
| sirdoug21 | Finding Flags | 2 | |
| random_two0 | Monoprime | 30 | |
| Toikka | Euler's Totient | 20 |
You are now level Current level