| Date | User | Challenge | Score |
| tabboPNW | Favourite byte | 20 | |
| D3c0d3R_1337 | Monoprime | 30 | |
| Diana_no7 | Favourite byte | 20 | |
| Brock_hash | XOR Starter | 10 | |
| ErnestoVizoso | Hex | 5 | |
| D3c0d3R_1337 | Factoring | 15 | |
| D3c0d3R_1337 | RSA Signatures | 25 | |
| creep3r | Greatest Common Divisor | 15 | |
| abiogen3sis | Finding Flags | 2 | |
| lapa | XOR Properties | 15 | |
| Giovanni2004 | CTRIME | 70 | |
| creep3r | You either know, XOR you don't | 30 | |
| ErnestoVizoso | ASCII | 5 | |
| jskeob | ProSign 3 | 100 | |
| ElenaT | Bounded Noise | 50 | |
| dyeclop | Adrien's Signs | 80 | |
| creep3r | Favourite byte | 20 | |
| moritzraho | Diffusion through Permutation | 30 | |
| Diana_no7 | XOR Properties | 15 | |
| creep3r | XOR Properties | 15 | |
| Kadouftra | XOR Starter | 10 | |
| dyeclop | Chinese Remainder Theorem | 40 | |
| Kadouftra | Bytes and Big Integers | 10 | |
| Brock_hash | Bytes and Big Integers | 10 | |
| dyeclop | Modular Square Root | 35 | |
| kamawui | Base64 | 10 | |
| Khevin07k | Encoding Challenge | 40 | |
| kamawui | Hex | 5 | |
| kamawui | ASCII | 5 | |
| Abstract | XOR Properties | 15 | |
| kamawui | Great Snakes | 3 | |
| Kadouftra | Base64 | 10 | |
| kamawui | Finding Flags | 2 | |
| malathisrinivas | Finding Flags | 2 | |
| dyeclop | Legendre Symbol | 35 | |
| ElenaT | Noise Free | 40 | |
| lucy54 | PriMeD5 | 100 | |
| J4n | Hex | 5 | |
| juli_2011 | ASCII | 5 | |
| sean_summer | Resisting Bruteforce | 10 | |
| Juggernaut1812 | RSA Signatures | 25 | |
| Amani | You either know, XOR you don't | 30 | |
| dyeclop | Quadratic Residues | 25 | |
| Amani | Favourite byte | 20 | |
| Amani | XOR Properties | 15 | |
| matiosos | Base64 | 10 | |
| juli_2011 | Great Snakes | 3 | |
| Amani | XOR Starter | 10 | |
| Juggernaut1812 | RSA Decryption | 20 | |
| Amani | Bytes and Big Integers | 10 |
You are now level Current level