| Date | User | Challenge | Score |
| cryptoRiO | Secure Protocols | 5 | |
| syadidd | ECB CBC WTF | 55 | |
| Nicholas_Ong | Bytes and Big Integers | 10 | |
| Nicholas_Ong | Base64 | 10 | |
| GhostYLP | Extended GCD | 20 | |
| Nicholas_Ong | Hex | 5 | |
| cryptoRiO | RSA or HMAC? Part 2 | 100 | |
| Nicholas_Ong | ASCII | 5 | |
| Nicholas_Ong | Network Attacks | 5 | |
| dapa_ayayyy | Modular Arithmetic 1 | 20 | |
| Nicholas_Ong | Great Snakes | 3 | |
| sejin | Quadratic Residues | 25 | |
| Nicholas_Ong | Finding Flags | 2 | |
| khxjn | Micro Transmissions | 120 | |
| OutOfTheWell | Proofs of Knowledge | 20 | |
| nesho | Encoding Challenge | 40 | |
| syadidd | Passwords as Keys | 50 | |
| j22465 | Base64 | 10 | |
| feynhat | Encoding Challenge | 40 | |
| mathical0732 | Moving Problems | 150 | |
| Junezq | Hex | 5 | |
| sejin | Extended GCD | 20 | |
| Xirius | Greatest Common Divisor | 15 | |
| Nadarama | RSA Decryption | 20 | |
| Nadarama | Private Keys | 20 | |
| Xirius | You either know, XOR you don't | 30 | |
| silover | Finding Flags | 2 | |
| GhostYLP | Greatest Common Divisor | 15 | |
| sejin | Chinese Remainder Theorem | 40 | |
| gnyy | Favourite byte | 20 | |
| j22465 | Hex | 5 | |
| PwnMaster | XOR Starter | 10 | |
| PwnMaster | Bytes and Big Integers | 10 | |
| bashrc | Better than Linear | 85 | |
| PwnMaster | Base64 | 10 | |
| bashrc | Breaking SIDH | 250 | |
| bashrc | A True Genus | 175 | |
| bashrc | Meet me in the Claw | 120 | |
| PwnMaster | Hex | 5 | |
| bashrc | Dual Masters | 90 | |
| bashrc | Abelian SIDH | 90 | |
| bashrc | André Encoding | 80 | |
| sejin | Modular Square Root | 35 | |
| Xirius | Favourite byte | 20 | |
| PwnMaster | ASCII | 5 | |
| bashrc | What's My Kernel | 70 | |
| PwnMaster | Great Snakes | 3 | |
| Vinjr | The Matrix Reloaded | 100 | |
| Xirius | XOR Properties | 15 | |
| bashrc | SIDH Key Exchange | 80 |
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