| Date | User | Challenge | Score |
| ScottMefisto | RSA or HMAC? Part 2 | 100 | |
| JoseMiguelz | RSA or HMAC? Part 2 | 100 | |
| Tomakao | Base64 | 10 | |
| Peer | Network Attacks | 5 | |
| danielk | Passwords as Keys | 50 | |
| nwal | Modes of Operation Starter | 15 | |
| jaeyeon | Modular Inverting | 25 | |
| jaeyeon | Modular Arithmetic 2 | 20 | |
| jaeyeon | Modular Arithmetic 1 | 20 | |
| Hyeonbin | RSA Decryption | 20 | |
| hippo333 | Modular Square Root | 35 | |
| jaeyeon | Extended GCD | 20 | |
| danielk | Modes of Operation Starter | 15 | |
| danielk | Bringing It All Together | 50 | |
| Hyeonbin | Private Keys | 20 | |
| danielk | Diffusion through Permutation | 30 | |
| hippo333 | Legendre Symbol | 35 | |
| Tomakao | Hex | 5 | |
| Hyeonbin | Euler's Totient | 20 | |
| nwal | Bringing It All Together | 50 | |
| Hyeonbin | Public Keys | 15 | |
| danielk | Confusion through Substitution | 25 | |
| jaeyeon | Lazy CBC | 60 | |
| jaeyeon | ECB CBC WTF | 55 | |
| xlj666 | Size and Basis | 15 | |
| GroGod | Great Snakes | 3 | |
| ThaityBoby17 | Working with Fields | 10 | |
| jaeyeon | Triple DES | 60 | |
| jaeyeon | ECB Oracle | 60 | |
| danielk | Round Keys | 20 | |
| jaeyeon | Flipping Cookie | 60 | |
| SeoYongHong | Passwords as Keys | 50 | |
| jaeyeon | Passwords as Keys | 50 | |
| Hyeonbin | Modular Exponentiation | 10 | |
| xlj666 | Vectors | 10 | |
| Merci_b | Monoprime | 30 | |
| adssafsad | RSA Decryption | 20 | |
| GroGod | Finding Flags | 2 | |
| danielk | Structure of AES | 15 | |
| jaeyeon | Lemur XOR | 40 | |
| adssafsad | Private Keys | 20 | |
| Peer | Deriving Symmetric Keys | 40 | |
| adssafsad | Euler's Totient | 20 | |
| danielk | Resisting Bruteforce | 10 | |
| danielk | Keyed Permutations | 5 | |
| danielk | Modular Binomials | 80 | |
| adssafsad | Public Keys | 15 | |
| jaeyeon | Greatest Common Divisor | 15 | |
| adssafsad | Modular Exponentiation | 10 | |
| MAZAKA | XOR Properties | 15 |
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