| Date | User | Challenge | Score |
| shura356 | Real Eisenstein | 150 | |
| joudahmad003 | CERTainly not | 30 | |
| hrishivaran | Base64 | 10 | |
| Jevgenious | XOR Starter | 10 | |
| joudahmad003 | Privacy-Enhanced Mail? | 25 | |
| teck | Finding Flags | 2 | |
| hrishivaran | Hex | 5 | |
| joudahmad003 | Modular Inverting | 25 | |
| hrishivaran | ASCII | 5 | |
| joudahmad003 | Modular Arithmetic 2 | 20 | |
| hrishivaran | Great Snakes | 3 | |
| That11thHarmonic | Size and Basis | 15 | |
| joudahmad003 | Modular Arithmetic 1 | 20 | |
| joudahmad003 | Extended GCD | 20 | |
| joudahmad003 | Greatest Common Divisor | 15 | |
| joudahmad003 | You either know, XOR you don't | 30 | |
| joudahmad003 | Favourite byte | 20 | |
| That11thHarmonic | Vectors | 10 | |
| 2aviv20 | Hex | 5 | |
| joudahmad003 | XOR Starter | 10 | |
| 2aviv20 | ASCII | 5 | |
| joudahmad003 | Encoding Challenge | 40 | |
| Ah_Crypto2 | ECB Oracle | 60 | |
| Thanosong | Legendre Symbol | 35 | |
| wangdi7670 | You either know, XOR you don't | 30 | |
| joudahmad003 | Bytes and Big Integers | 10 | |
| enoxtraveller | Finding Flags | 2 | |
| Thanosong | Quadratic Residues | 25 | |
| CYB3RFY | Greatest Common Divisor | 15 | |
| joudahmad003 | Base64 | 10 | |
| hrishivaran | Finding Flags | 2 | |
| joudahmad003 | Hex | 5 | |
| 0xGR007 | You either know, XOR you don't | 30 | |
| minshay | Favourite byte | 20 | |
| joudahmad003 | ASCII | 5 | |
| 2aviv20 | Great Snakes | 3 | |
| 0xGR007 | Favourite byte | 20 | |
| 2aviv20 | Finding Flags | 2 | |
| minshay | XOR Properties | 15 | |
| Thanosong | Lemur XOR | 40 | |
| pppp | Null or Never | 100 | |
| 0xGR007 | XOR Properties | 15 | |
| Thanosong | Jack's Birthday Hash | 20 | |
| jyhoon | Computing Public Values | 25 | |
| Thanosong | JWT Sessions | 10 | |
| Thanosong | Token Appreciation | 5 | |
| 0xGR007 | XOR Starter | 10 | |
| 0xGR007 | Bytes and Big Integers | 10 | |
| MarkMagallis | RSA Decryption | 20 | |
| MarkMagallis | Private Keys | 20 |
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