| Date | User | Challenge | Score |
| Kruszyna | Adrien's Signs | 80 | |
| znur | Finding Flags | 2 | |
| liem2008 | XOR Properties | 15 | |
| paulti | RSA or HMAC? Part 2 | 100 | |
| Socrates | ASCII | 5 | |
| dhiaharketi | Base64 | 10 | |
| AaqibMir | You either know, XOR you don't | 30 | |
| AmirWayne | Round Keys | 20 | |
| dhiaharketi | Hex | 5 | |
| vaioskl | RSA Decryption | 20 | |
| Socrates | Great Snakes | 3 | |
| liem2008 | XOR Starter | 10 | |
| oGAD_ | Confusion through Substitution | 25 | |
| dhiaharketi | ASCII | 5 | |
| achilleas | Bringing It All Together | 50 | |
| dhiaharketi | Great Snakes | 3 | |
| dhiaharketi | Finding Flags | 2 | |
| mar_ven | Curves and Logs | 40 | |
| mar_ven | Scalar Multiplication | 35 | |
| AaqibMir | Favourite byte | 20 | |
| tts76 | Modular Binomials | 80 | |
| mar_ven | Point Addition | 30 | |
| dabrowskaa | Secure Protocols | 5 | |
| bowie41 | Marin's Secrets | 50 | |
| mar_ven | Background Reading | 5 | |
| achilleas | Diffusion through Permutation | 30 | |
| AaqibMir | XOR Properties | 15 | |
| Ulocc | XOR Starter | 10 | |
| RMO | Greatest Common Divisor | 15 | |
| nizarr | RSA Signatures | 25 | |
| MrD | Passwords as Keys | 50 | |
| dabrowskaa | JSON in JSON | 40 | |
| darththucydides | Point Negation | 10 | |
| vaioskl | Private Keys | 20 | |
| bowie41 | Infinite Descent | 50 | |
| Kreons | SSH Keys | 35 | |
| Malka | Modular Inverting | 25 | |
| bowie41 | Endless Emails | 150 | |
| mar_ven | Legendre Symbol | 35 | |
| achilleas | Confusion through Substitution | 25 | |
| Ulocc | Bytes and Big Integers | 10 | |
| Kreons | CERTainly not | 30 | |
| kleiosyrigou | Modular Inverting | 25 | |
| Leoritsos | Successive Powers | 60 | |
| AmirWayne | Structure of AES | 15 | |
| kleiosyrigou | Modular Arithmetic 2 | 20 | |
| kleiosyrigou | Modular Arithmetic 1 | 20 | |
| kleiosyrigou | Extended GCD | 20 | |
| mar_ven | Quadratic Residues | 25 | |
| achilleas | Round Keys | 20 |
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