| Date | User | Challenge | Score |
| kihoro | XOR Properties | 15 | |
| Farkladin | Keyed Permutations | 5 | |
| kihoro | XOR Starter | 10 | |
| 25520948 | ECB CBC WTF | 55 | |
| kihoro | Bytes and Big Integers | 10 | |
| kihoro | Base64 | 10 | |
| 202011156 | XOR Properties | 15 | |
| DoitouKatsuki | Round Keys | 20 | |
| kada_anes | XOR Starter | 10 | |
| asanonepunch | Privacy-Enhanced Mail? | 25 | |
| Julius_Caesar | Quadratic Residues | 25 | |
| kjhp02 | Base64 | 10 | |
| sarveshwaran | XOR Properties | 15 | |
| Julius_Caesar | Modular Inverting | 25 | |
| sarveshwaran | XOR Starter | 10 | |
| kjhp02 | Hex | 5 | |
| sarveshwaran | Bytes and Big Integers | 10 | |
| Julius_Caesar | Modular Arithmetic 2 | 20 | |
| kihoro | Hex | 5 | |
| kjhp02 | ASCII | 5 | |
| Julius_Caesar | Modular Arithmetic 1 | 20 | |
| kjhp02 | Great Snakes | 3 | |
| 202011156 | XOR Starter | 10 | |
| kjhp02 | Finding Flags | 2 | |
| 25520948 | Passwords as Keys | 50 | |
| kihoro | ASCII | 5 | |
| kada_anes | Bytes and Big Integers | 10 | |
| zetelen | Computing Shared Secrets | 30 | |
| minwoo1006 | Quadratic Residues | 25 | |
| DoitouKatsuki | Structure of AES | 15 | |
| kihoro | Great Snakes | 3 | |
| sarveshwaran | Base64 | 10 | |
| shinee | Modular Binomials | 80 | |
| ssbnn | Chinese Remainder Theorem | 40 | |
| Youri_Han | Base64 | 10 | |
| DuckyDuck | Two Isogenies | 30 | |
| 202011156 | Bytes and Big Integers | 10 | |
| ssbnn | Modular Square Root | 35 | |
| ssbnn | Legendre Symbol | 35 | |
| sarveshwaran | Hex | 5 | |
| Julius_Caesar | Extended GCD | 20 | |
| zetelen | Computing Public Values | 25 | |
| 202011156 | Base64 | 10 | |
| ssbnn | Quadratic Residues | 25 | |
| DoitouKatsuki | Resisting Bruteforce | 10 | |
| Youri_Han | Hex | 5 | |
| Julius_Caesar | Greatest Common Divisor | 15 | |
| Youri_Han | ASCII | 5 | |
| minwoo1006 | Modular Inverting | 25 | |
| Kimkangsan | ECB Oracle | 60 |
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