| Date | User | Challenge | Score |
| maskmovdqu | Quadratic Residues | 25 | |
| khyrr | XOR Starter | 10 | |
| maskmovdqu | Modular Inverting | 25 | |
| SolraTCDN | Network Attacks | 5 | |
| maskmovdqu | Modular Arithmetic 2 | 20 | |
| NonCapiscoNiente | Finding Flags | 2 | |
| tarta | ASCII | 5 | |
| pablorumanope | RSA Decryption | 20 | |
| Papalo007 | Factoring | 15 | |
| maskmovdqu | Modular Arithmetic 1 | 20 | |
| maskmovdqu | Extended GCD | 20 | |
| tarta | Network Attacks | 5 | |
| Lauraq | Hex | 5 | |
| pablorumanope | Private Keys | 20 | |
| Giovicyberchall | Great Snakes | 3 | |
| Giovicyberchall | Finding Flags | 2 | |
| pablorumanope | Euler's Totient | 20 | |
| nmhuei | Passwords as Keys | 50 | |
| Lauraq | ASCII | 5 | |
| MAKAROV2005 | XOR Starter | 10 | |
| pablorumanope | Public Keys | 15 | |
| pablorumanope | Modular Exponentiation | 10 | |
| hata | Fischlin Transform | 180 | |
| hata | Fischlin's Transformation (CryptoHack) | 0 | |
| MAKAROV2005 | Bytes and Big Integers | 10 | |
| mahu | Broken RSA | 100 | |
| tarta | Great Snakes | 3 | |
| sheina906 | Vote for Pedro | 150 | |
| MAKAROV2005 | Base64 | 10 | |
| pablorumanope | Base64 | 10 | |
| Lauraq | Great Snakes | 3 | |
| laracesco | Base64 | 10 | |
| tarta | Finding Flags | 2 | |
| Lauraq | Finding Flags | 2 | |
| cbr4l0k | Network Attacks | 5 | |
| laracesco | Hex | 5 | |
| Lunick | Encoding Challenge | 40 | |
| Papalo007 | RSA Signatures | 25 | |
| mahu | No Way Back Home | 100 | |
| khyrr | Bytes and Big Integers | 10 | |
| laracesco | ASCII | 5 | |
| laracesco | Great Snakes | 3 | |
| laracesco | Finding Flags | 2 | |
| lauretti | Background Reading | 5 | |
| lauretti | Privacy-Enhanced Mail? | 25 | |
| cbr4l0k | Bean Counter | 60 | |
| testingworldfull | Symmetry | 50 | |
| Lelle | RSA or HMAC? Part 2 | 100 | |
| NitroN | Flipping Cookie | 60 | |
| sheina906 | Let's Decrypt | 80 |
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