| Date | User | Challenge | Score |
| nprat | Modular Arithmetic 1 | 20 | |
| Zaur009 | Diffusion through Permutation | 30 | |
| barneyd | Hex | 5 | |
| nprat | Extended GCD | 20 | |
| anush | Modular Binomials | 80 | |
| barneyd | ASCII | 5 | |
| TechnicCryptohac | Hex | 5 | |
| barneyd | Great Snakes | 3 | |
| TechnicCryptohac | ASCII | 5 | |
| HIDEN | Hex | 5 | |
| TechnicCryptohac | Great Snakes | 3 | |
| barneyd | Finding Flags | 2 | |
| TechnicCryptohac | Finding Flags | 2 | |
| potifypremium | Favourite byte | 20 | |
| Zaur009 | Confusion through Substitution | 25 | |
| BarredOwl | Favourite byte | 20 | |
| Crypto_gram | Encoding Challenge | 40 | |
| biggerbomber | CTRIME | 70 | |
| anush | Adrien's Signs | 80 | |
| AndreAzu | Passwords as Keys | 50 | |
| potifypremium | XOR Properties | 15 | |
| AndreAzu | Modes of Operation Starter | 15 | |
| h1gkpo | ASCII | 5 | |
| AndreAzu | Bringing It All Together | 50 | |
| Crypto_gram | Gotta Go Fast | 40 | |
| AndreAzu | Diffusion through Permutation | 30 | |
| AndreAzu | Confusion through Substitution | 25 | |
| Fozeton | ASCII | 5 | |
| AndreAzu | Round Keys | 20 | |
| AndreAzu | Structure of AES | 15 | |
| AndreAzu | Resisting Bruteforce | 10 | |
| Fozeton | Great Snakes | 3 | |
| Vanessa_Nevar | Finding Flags | 2 | |
| Fozeton | Finding Flags | 2 | |
| AndreAzu | Export-grade | 100 | |
| tormuzz | Privacy-Enhanced Mail? | 25 | |
| AndreAzu | Parameter Injection | 60 | |
| Muthii | Flipping Cookie | 60 | |
| tormuzz | Modular Inverting | 25 | |
| Rohan_Kapri | Finding Flags | 2 | |
| OlimpikMihmandar | Finding Flags | 2 | |
| Muthii | ECB CBC WTF | 55 | |
| biggerbomber | Triple DES | 60 | |
| AndreAzu | Deriving Symmetric Keys | 40 | |
| AndreAzu | Computing Shared Secrets | 30 | |
| AndreAzu | Computing Public Values | 25 | |
| AndreAzu | Generators of Groups | 20 | |
| AndreAzu | Working with Fields | 10 | |
| AndreAzu | Modulus Inutilis | 50 | |
| biggerbomber | Lazy CBC | 60 |
You are now level Current level