| Date | User | Challenge | Score |
| dennisdrak_ | Passwords as Keys | 50 | |
| sweatyrocket | Hyper512 (HITCON CTF) | 0 | |
| baitfr | Generators of Groups | 20 | |
| Hammad_X42 | Network Attacks | 5 | |
| jostar | Modular Arithmetic 1 | 20 | |
| billy_leiv | Bytes and Big Integers | 10 | |
| Thaimeo2006 | Signing Server | 60 | |
| didwnghks418 | Bytes and Big Integers | 10 | |
| annakouk | JSON in JSON | 40 | |
| ukfeliz | XOR Starter | 10 | |
| jostar | Modular Inverting | 25 | |
| armacrab | Structure of AES | 15 | |
| 253 | Bytes and Big Integers | 10 | |
| jostar | Extended GCD | 20 | |
| enqn0107 | Bytes and Big Integers | 10 | |
| Lef264 | Confusion through Substitution | 25 | |
| jostar | Greatest Common Divisor | 15 | |
| AYM | Legendre Symbol | 35 | |
| GiorgosKonst | Great Snakes | 3 | |
| Rigobertoncio | Size and Basis | 15 | |
| Red0psD3v4rsh007 | Modular Binomials | 80 | |
| Rigobertoncio | Vectors | 10 | |
| as_cool_as_me | Base64 | 10 | |
| GiorgosKonst | Finding Flags | 2 | |
| Rigobertoncio | Background Reading | 5 | |
| ukfeliz | Bytes and Big Integers | 10 | |
| eduardos | Base64 | 10 | |
| billy_leiv | Base64 | 10 | |
| as_cool_as_me | Hex | 5 | |
| Hansi | Salty | 20 | |
| y0dam4n | Bringing It All Together | 50 | |
| CocococoNun | Bytes and Big Integers | 10 | |
| Rigobertoncio | No Leaks | 100 | |
| billy_leiv | Hex | 5 | |
| eduardos | Hex | 5 | |
| cafekao | Bytes and Big Integers | 10 | |
| sma11pi9 | Ron was Wrong, Whit is Right | 90 | |
| rohith_18 | Adrien's Signs | 80 | |
| eduardos | ASCII | 5 | |
| Hansi | Square Eyes | 35 | |
| enqn0107 | Base64 | 10 | |
| Meen4 | Salty | 20 | |
| 253 | Base64 | 10 | |
| didwnghks418 | Base64 | 10 | |
| tts76 | Quadratic Residues | 25 | |
| cafekao | Base64 | 10 | |
| CocococoNun | Base64 | 10 | |
| billy_leiv | ASCII | 5 | |
| apricotblos | Base64 | 10 | |
| Thaimeo2006 | Everything is Still Big | 100 |
You are now level Current level