| Date | User | Challenge | Score |
| SuikaPredator | Symmetry | 50 | |
| Ankur_Algo | Network Attacks | 5 | |
| olzhas1 | Base64 | 10 | |
| chmakorkrich | Keyed Permutations | 5 | |
| Julie_Yeh | Modular Arithmetic 2 | 20 | |
| hashiryo | Quadratic Residues | 25 | |
| noppakorn001 | 2020 (TETCTF) | 0 | |
| NicoNieners | Round Keys | 20 | |
| noppakorn001 | C0ll1d3r (Firebird Internal CTF) | 0 | |
| yowsevanz | Chinese Remainder Theorem | 40 | |
| Julie_Yeh | Modular Arithmetic 1 | 20 | |
| hashiryo | Modular Inverting | 25 | |
| shirasu2006 | Base64 | 10 | |
| anbarbon | XOR Properties | 15 | |
| hashiryo | Modular Arithmetic 2 | 20 | |
| shirasu2006 | Hex | 5 | |
| hashiryo | Modular Arithmetic 1 | 20 | |
| User0069 | Nothing Up My Sleeve | 150 | |
| shirasu2006 | ASCII | 5 | |
| PolyFluorine | Secure Protocols | 5 | |
| Julie_Yeh | Extended GCD | 20 | |
| NicoNieners | Structure of AES | 15 | |
| PolyFluorine | RSA or HMAC? Part 2 | 100 | |
| hashiryo | Extended GCD | 20 | |
| shirasu2006 | Great Snakes | 3 | |
| olzhas1 | Hex | 5 | |
| evantampa129 | RSA Signatures | 25 | |
| shirasu2006 | Finding Flags | 2 | |
| olzhas1 | ASCII | 5 | |
| NicoNieners | Resisting Bruteforce | 10 | |
| olzhas1 | Great Snakes | 3 | |
| olzhas1 | Finding Flags | 2 | |
| NicoNieners | Keyed Permutations | 5 | |
| NicoNieners | Modular Binomials | 80 | |
| Arsyf | XOR Starter | 10 | |
| Zira | Computing Public Values | 25 | |
| jayguo | Confusion through Substitution | 25 | |
| evantampa129 | RSA Decryption | 20 | |
| Ankur_Algo | Finding Flags | 2 | |
| PolyFluorine | JSON in JSON | 40 | |
| hashiryo | Greatest Common Divisor | 15 | |
| cryptopro | XOR Properties | 15 | |
| evantampa129 | Private Keys | 20 | |
| shatokhinp | Transparency | 50 | |
| Galxee | Great Snakes | 3 | |
| Galxee | Finding Flags | 2 | |
| cryptopro | XOR Starter | 10 | |
| PolyFluorine | RSA or HMAC? | 35 | |
| tigerBoss101 | Logon Zero | 80 | |
| Kaixx | Finding Flags | 2 |
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