| Date | User | Challenge | Score |
| cy4nnn6999 | Bytes and Big Integers | 10 | |
| mk312 | Hex | 5 | |
| sandramuriuki | Modular Arithmetic 2 | 20 | |
| mk312 | ASCII | 5 | |
| sandramuriuki | Modular Arithmetic 1 | 20 | |
| sandramuriuki | Extended GCD | 20 | |
| mk312 | Network Attacks | 5 | |
| 0xOuss | Modular Arithmetic 2 | 20 | |
| s0uls | Greatest Common Divisor | 15 | |
| Kacpereniek | Roll your Own | 125 | |
| Kacpereniek | Unencryptable | 125 | |
| sandramuriuki | Greatest Common Divisor | 15 | |
| Kacpereniek | No Way Back Home | 100 | |
| Kacpereniek | Broken RSA | 100 | |
| mk312 | Great Snakes | 3 | |
| Kacpereniek | Modular Binomials | 80 | |
| sandramuriuki | You either know, XOR you don't | 30 | |
| Kacpereniek | Adrien's Signs | 80 | |
| Kacpereniek | Common Ground | 75 | |
| mk312 | Finding Flags | 2 | |
| Kacpereniek | Modular Square Root | 35 | |
| Kacpereniek | Legendre Symbol | 35 | |
| Kacpereniek | Successive Powers | 60 | |
| cer00ja | The Good, The Pad, The Ugly | 100 | |
| cer00ja | Pad Thai | 80 | |
| cer00ja | Oh SNAP | 120 | |
| cer00ja | Dancing Queen | 120 | |
| Kacpereniek | Chinese Remainder Theorem | 40 | |
| Kacpereniek | Quadratic Residues | 25 | |
| isabel | Finding Flags | 2 | |
| miloud | Privacy-Enhanced Mail? | 25 | |
| cer00ja | Stream of Consciousness | 80 | |
| cer00ja | CTRIME | 70 | |
| cer00ja | Logon Zero | 80 | |
| vibe_013 | Background Reading | 5 | |
| cer00ja | Triple DES | 60 | |
| vibe_013 | Modes of Operation Starter | 15 | |
| cer00ja | Lazy CBC | 60 | |
| vibe_013 | Bringing It All Together | 50 | |
| vibe_013 | Diffusion through Permutation | 30 | |
| vibe_013 | Confusion through Substitution | 25 | |
| vibe_013 | Round Keys | 20 | |
| vibe_013 | Structure of AES | 15 | |
| vibe_013 | Resisting Bruteforce | 10 | |
| vibe_013 | Keyed Permutations | 5 | |
| vibe_013 | Private Keys | 20 | |
| vibe_013 | Euler's Totient | 20 | |
| vibe_013 | Public Keys | 15 | |
| vibe_013 | Modular Exponentiation | 10 | |
| koooaaa | Favourite byte | 20 |
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