| Date | User | Challenge | Score |
| Reddy2 | Base64 | 10 | |
| ei15951 | Flipping Cookie | 60 | |
| leonid_miner | Modular Inverting | 25 | |
| leonid_miner | Modular Arithmetic 2 | 20 | |
| ei15951 | ECB CBC WTF | 55 | |
| Reddy2 | Hex | 5 | |
| leonid_miner | Modular Arithmetic 1 | 20 | |
| ei15951 | ECB Oracle | 60 | |
| Reddy2 | ASCII | 5 | |
| leonid_miner | Extended GCD | 20 | |
| VxRabbit | Keyed Permutations | 5 | |
| ei15951 | Passwords as Keys | 50 | |
| Tbobaggins | Bytes and Big Integers | 10 | |
| leonid_miner | Greatest Common Divisor | 15 | |
| Tomzi | Base64 | 10 | |
| Dimitris_Toulis | RSA or HMAC? Part 2 | 100 | |
| saus | Hamiltonicity (CryptoHack) | 0 | |
| Tomzi | Hex | 5 | |
| ei15951 | Modes of Operation Starter | 15 | |
| saus | Hamiltonicity 1 | 100 | |
| Yepppp | Finding Flags | 2 | |
| ei15951 | Bringing It All Together | 50 | |
| medb556 | Diffusion through Permutation | 30 | |
| K1dnapper | Modular Square Root | 35 | |
| Dimitris_Toulis | Decrypting TLS 1.3 | 35 | |
| ei15951 | Diffusion through Permutation | 30 | |
| Dimitris_Toulis | Decrypting TLS 1.2 | 30 | |
| ei15951 | Confusion through Substitution | 25 | |
| Dimitris_Toulis | Saying Hello | 20 | |
| Dimitris_Toulis | TLS Handshake | 15 | |
| Franh28 | Legendre Symbol | 35 | |
| Astorice | Bytes and Big Integers | 10 | |
| Franh28 | Quadratic Residues | 25 | |
| Dimitris_Toulis | Sharks on the Wire | 10 | |
| goatant | Hex | 5 | |
| Dimitris_Toulis | Secure Protocols | 5 | |
| liupie | Finding Flags | 2 | |
| goatant | ASCII | 5 | |
| Franh28 | Modular Inverting | 25 | |
| goatant | Great Snakes | 3 | |
| Mageto | Extended GCD | 20 | |
| Franh28 | Modular Arithmetic 2 | 20 | |
| goatant | Finding Flags | 2 | |
| K1dnapper | Legendre Symbol | 35 | |
| Franh28 | Modular Arithmetic 1 | 20 | |
| CyberDestiny | ASCII | 5 | |
| Franh28 | Extended GCD | 20 | |
| Franh28 | Greatest Common Divisor | 15 | |
| martigo | Confusion through Substitution | 25 | |
| Astorice | Base64 | 10 |
You are now level Current level