| Date | User | Challenge | Score |
| Tatev | Background Reading | 5 | |
| manumuffin | Bytes and Big Integers | 10 | |
| wangcongcong | Modular Arithmetic 2 | 20 | |
| cryptoRiO | No Way JOSE | 20 | |
| nhkphp | Transparency | 50 | |
| Ohrorong | Efficient Exchange | 50 | |
| nhkphp | SSH Keys | 35 | |
| MaggieSimpson | Finding Flags | 2 | |
| nhkphp | CERTainly not | 30 | |
| Z10UD1 | Modular Square Root | 35 | |
| nhkphp | Privacy-Enhanced Mail? | 25 | |
| nhkphp | Modular Inverting | 25 | |
| rusketh | Extended GCD | 20 | |
| l3th4l | Let's Decrypt | 80 | |
| nhkphp | Modular Arithmetic 2 | 20 | |
| nhkphp | Modular Arithmetic 1 | 20 | |
| nhkphp | Extended GCD | 20 | |
| Danny_Drake34 | Finding Flags | 2 | |
| nhkphp | Greatest Common Divisor | 15 | |
| wangcongcong | Modular Arithmetic 1 | 20 | |
| nhkphp | Lemur XOR | 40 | |
| Tatev | Modular Inverting | 25 | |
| Aether0810 | ASCII | 5 | |
| nhkphp | Encoding Challenge | 40 | |
| hanahiennguyen | Curves and Logs | 40 | |
| cryptoRiO | WOTS Up 2 | 90 | |
| Zira | Base64 | 10 | |
| Tatev | Modular Arithmetic 2 | 20 | |
| nhkphp | Network Attacks | 5 | |
| Tatev | Modular Arithmetic 1 | 20 | |
| Ohrorong | Curves and Logs | 40 | |
| nhkphp | You either know, XOR you don't | 30 | |
| Aether0810 | Great Snakes | 3 | |
| Zira | Hex | 5 | |
| rootBG | Curves and Logs | 40 | |
| rusketh | Greatest Common Divisor | 15 | |
| Zira | ASCII | 5 | |
| 0_0A | RSA Decryption | 20 | |
| Hemn7th | You either know, XOR you don't | 30 | |
| mortal | Hex | 5 | |
| nhkphp | Favourite byte | 20 | |
| nhkphp | XOR Properties | 15 | |
| mortal | ASCII | 5 | |
| Hemn7th | Favourite byte | 20 | |
| Zira | Network Attacks | 5 | |
| Hemn7th | XOR Properties | 15 | |
| Hemn7th | XOR Starter | 10 | |
| Ohrorong | Scalar Multiplication | 35 | |
| mboh2 | Adrien's Signs | 80 | |
| Hemn7th | Encoding Challenge | 40 |
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