| Date | User | Challenge | Score |
| y0dam4n | Forbidden Fruit | 150 | |
| la_vltk | SSH Keys | 35 | |
| Balkue | Round Keys | 20 | |
| hanan0x37 | Extended GCD | 20 | |
| NK_HERE | Quadratic Residues | 25 | |
| methodtoss | Modular Inverting | 25 | |
| Ebrahim2028 | Let's Decrypt Again | 175 | |
| Ebrahim2028 | Vote for Pedro | 150 | |
| paranoct | Bytes and Big Integers | 10 | |
| Ebrahim2028 | Blinding Light | 120 | |
| Ebrahim2028 | Let's Decrypt | 80 | |
| Ebrahim2028 | Signing Server | 60 | |
| Ebrahim2028 | Null or Never | 100 | |
| Ebrahim2028 | Bespoke Padding | 100 | |
| Zbook | Passwords as Keys | 50 | |
| Ebrahim2028 | RSA Backdoor Viability | 175 | |
| Ebrahim2028 | Ron was Wrong, Whit is Right | 90 | |
| Ebrahim2028 | Fast Primes | 75 | |
| Ebrahim2028 | Marin's Secrets | 50 | |
| Ebrahim2028 | Infinite Descent | 50 | |
| Balkue | Structure of AES | 15 | |
| Ebrahim2028 | Endless Emails | 150 | |
| Ebrahim2028 | Everything is Still Big | 100 | |
| Ebrahim2028 | Crossed Wires | 100 | |
| Ebrahim2028 | Everything is Big | 70 | |
| Ebrahim2028 | Modulus Inutilis | 50 | |
| Ebrahim2028 | Salty | 20 | |
| estoic_identity | RSA Decryption | 20 | |
| Ebrahim2028 | Manyprime | 40 | |
| Ebrahim2028 | Square Eyes | 35 | |
| Ebrahim2028 | Monoprime | 30 | |
| Alain1221 | Chinese Remainder Theorem | 40 | |
| Ebrahim2028 | Inferius Prime | 30 | |
| la_vltk | CERTainly not | 30 | |
| katikistan | XOR Starter | 10 | |
| Zbook | Modes of Operation Starter | 15 | |
| Zbook | Bringing It All Together | 50 | |
| Zbook | Diffusion through Permutation | 30 | |
| Zbook | Confusion through Substitution | 25 | |
| lrh0525 | Finding Flags | 2 | |
| PizzaGutt | Encoding Challenge | 40 | |
| Zbook | Round Keys | 20 | |
| hanan0x37 | Greatest Common Divisor | 15 | |
| Zbook | Structure of AES | 15 | |
| la_vltk | Privacy-Enhanced Mail? | 25 | |
| estoic_identity | Private Keys | 20 | |
| methodtoss | Modular Arithmetic 2 | 20 | |
| la_vltk | Lemur XOR | 40 | |
| Zbook | Resisting Bruteforce | 10 | |
| Balkue | Resisting Bruteforce | 10 |
You are now level Current level