| Date | User | Challenge | Score |
| zhaopy | Privacy-Enhanced Mail? | 25 | |
| AkitsuHolmes | Hex | 5 | |
| obaid | XOR Starter | 10 | |
| zhaopy | Lemur XOR | 40 | |
| KK5559D | Salty | 20 | |
| AkitsuHolmes | ASCII | 5 | |
| zhaopy | Encoding Challenge | 40 | |
| luckbrav | Great Snakes | 3 | |
| Hexerei | ZKP Introduction | 5 | |
| luckbrav | Finding Flags | 2 | |
| s1340079 | Private Keys | 20 | |
| s1340079 | Euler's Totient | 20 | |
| 1Mp0st3ur | ASCII | 5 | |
| 1Mp0st3ur | Great Snakes | 3 | |
| 1Mp0st3ur | Finding Flags | 2 | |
| Beoush | Great Snakes | 3 | |
| zeroman | Base64 | 10 | |
| Thayna_Andrade | Base64 | 10 | |
| Thayna_Andrade | Hex | 5 | |
| zeroman | Hex | 5 | |
| Thayna_Andrade | ASCII | 5 | |
| lucy54 | Mixed Up | 120 | |
| Thayna_Andrade | Great Snakes | 3 | |
| Thayna_Andrade | Finding Flags | 2 | |
| JacobLu3141 | Adrien's Signs | 80 | |
| IgnAto | Bytes and Big Integers | 10 | |
| Melvine | You either know, XOR you don't | 30 | |
| Melvine | Favourite byte | 20 | |
| Melvine | XOR Properties | 15 | |
| zeroman | ASCII | 5 | |
| NearXa | Broken RSA | 100 | |
| Beoush | Finding Flags | 2 | |
| CyberEX | XOR Properties | 15 | |
| Kawk | Legendre Symbol | 35 | |
| maksushka | Infinite Descent | 50 | |
| strang3l0ve | Base64 | 10 | |
| strang3l0ve | Hex | 5 | |
| strang3l0ve | ASCII | 5 | |
| strang3l0ve | Great Snakes | 3 | |
| Kawk | Quadratic Residues | 25 | |
| BlueBandit | Bytes and Big Integers | 10 | |
| zeroman | Great Snakes | 3 | |
| Kawk | Keyed Permutations | 5 | |
| zeroman | Finding Flags | 2 | |
| hakka52 | Megalomaniac 2 | 120 | |
| shame0x2 | XOR Properties | 15 | |
| CyberEX | XOR Starter | 10 | |
| strang3l0ve | Finding Flags | 2 | |
| CyberEX | Bytes and Big Integers | 10 | |
| BlueBandit | Base64 | 10 |
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