| Date | User | Challenge | Score |
| Connie6222 | Great Snakes | 3 | |
| Tanpa_R | Favourite byte | 20 | |
| Wisdom_doom | Modulus Inutilis | 50 | |
| joeyjoey | Bytes and Big Integers | 10 | |
| Tanpa_R | You either know, XOR you don't | 30 | |
| alm | Deriving Symmetric Keys | 40 | |
| itsyourdecide | Bytes and Big Integers | 10 | |
| joeyjoey | Base64 | 10 | |
| itsyourdecide | Base64 | 10 | |
| itsyourdecide | Hex | 5 | |
| joeyjoey | Hex | 5 | |
| joeyjoey | ASCII | 5 | |
| itsyourdecide | ASCII | 5 | |
| KryptoUser | Confusion through Substitution | 25 | |
| joeyjoey | Network Attacks | 5 | |
| joeyjoey | Great Snakes | 3 | |
| Ten | RSA Decryption | 20 | |
| Ten | Private Keys | 20 | |
| Ten | Euler's Totient | 20 | |
| itsyourdecide | Great Snakes | 3 | |
| Tanpa_R | XOR Properties | 15 | |
| Ten | Public Keys | 15 | |
| Ten | Modular Exponentiation | 10 | |
| joeyjoey | Finding Flags | 2 | |
| itsyourdecide | Finding Flags | 2 | |
| KryptoUser | Round Keys | 20 | |
| Connie6222 | Finding Flags | 2 | |
| gilbertotic | ASCII | 5 | |
| gilbertotic | Great Snakes | 3 | |
| Tanpa_R | XOR Starter | 10 | |
| KZOrP4Vl | Script Kiddie | 70 | |
| tranthienthanh | Gram Schmidt | 30 | |
| gilbertotic | Finding Flags | 2 | |
| Wisdom_doom | Salty | 20 | |
| KZOrP4Vl | Deriving Symmetric Keys | 40 | |
| M93 | You either know, XOR you don't | 30 | |
| KZOrP4Vl | Computing Shared Secrets | 30 | |
| KZOrP4Vl | Computing Public Values | 25 | |
| KZOrP4Vl | Generators of Groups | 20 | |
| KZOrP4Vl | Working with Fields | 10 | |
| KryptoUser | Structure of AES | 15 | |
| M93 | Favourite byte | 20 | |
| Kazee | Modular Binomials | 80 | |
| KryptoUser | Resisting Bruteforce | 10 | |
| Kazee | Adrien's Signs | 80 | |
| M93 | XOR Properties | 15 | |
| Srzhypc | Modular Arithmetic 2 | 20 | |
| M93 | XOR Starter | 10 | |
| tranthienthanh | Vectors | 10 | |
| tranthienthanh | Size and Basis | 15 |
You are now level Current level