| Date | User | Challenge | Score |
| saba | Hex | 5 | |
| Aeneas7 | Gaussian Reduction | 50 | |
| saba | ASCII | 5 | |
| hungthinh | Logon Zero | 80 | |
| Roxor | Gram Schmidt | 30 | |
| 0xcdcdcdcd | No Difference | 175 | |
| kubie | A Twisted Mind | 80 | |
| default03 | XOR Properties | 15 | |
| absimaman | Extended GCD | 20 | |
| negi | Monoprime | 30 | |
| jacekstrzalkowsk | Passwords as Keys | 50 | |
| negi | Factoring | 15 | |
| Roxor | Size and Basis | 15 | |
| Shou_Driz | Network Attacks | 5 | |
| Roxor | Vectors | 10 | |
| Skeletong | Legendre Symbol | 35 | |
| deyanix | Dancing Queen | 120 | |
| negi | RSA Decryption | 20 | |
| negi | Private Keys | 20 | |
| negi | Euler's Totient | 20 | |
| negi | Public Keys | 15 | |
| namtran1305 | Factoring | 15 | |
| sakshii | XOR Starter | 10 | |
| negi | Modular Exponentiation | 10 | |
| default03 | XOR Starter | 10 | |
| namdang | Broken RSA | 100 | |
| default03 | Bytes and Big Integers | 10 | |
| namtran1305 | RSA Signatures | 25 | |
| deyanix | Pad Thai | 80 | |
| sdolotom | Legendre Symbol | 35 | |
| geo_gkez | ECB Oracle | 60 | |
| negi | Diffusion through Permutation | 30 | |
| Mrsh1014 | Efficient Exchange | 50 | |
| default03 | Base64 | 10 | |
| negi | Confusion through Substitution | 25 | |
| botlvan | Base64 | 10 | |
| Farkladin | Greatest Common Divisor | 15 | |
| Aurn0b | You either know, XOR you don't | 30 | |
| otkroi_okno_w | RSA Decryption | 20 | |
| tkhnnh | Greatest Common Divisor | 15 | |
| PatrickL_SC | Confusion through Substitution | 25 | |
| Mrsh1014 | Curves and Logs | 40 | |
| negi | Round Keys | 20 | |
| SpyrosKonidas | TLS Handshake | 15 | |
| default03 | Hex | 5 | |
| Aurn0b | Favourite byte | 20 | |
| negi | Structure of AES | 15 | |
| namtran1305 | RSA Decryption | 20 | |
| js | Extended GCD | 20 | |
| SayWess | A Twisted Mind | 80 |
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