| Date | User | Challenge | Score |
| xristoforos | Bytes and Big Integers | 10 | |
| ciphermk | Modular Arithmetic 2 | 20 | |
| mmadeforjustine | Base64 | 10 | |
| 0x595 | Hex | 5 | |
| rush_i | Square Eyes | 35 | |
| didwnghks418 | RSA Decryption | 20 | |
| kjustKai | Modular Square Root | 35 | |
| Adel_Cr | Adrien's Signs | 80 | |
| Supriseman1 | Extended GCD | 20 | |
| Yaitulah | Legendre Symbol | 35 | |
| strv103c | XOR Starter | 10 | |
| mmadeforjustine | Hex | 5 | |
| mmadeforjustine | ASCII | 5 | |
| Kyle_0215 | Passwords as Keys | 50 | |
| Fengziyue | Favourite byte | 20 | |
| radare | The Good, The Pad, The Ugly | 100 | |
| Adel_Cr | Chinese Remainder Theorem | 40 | |
| kjustKai | You either know, XOR you don't | 30 | |
| mmadeforjustine | Great Snakes | 3 | |
| 0x595 | ASCII | 5 | |
| Adel_Cr | Modular Square Root | 35 | |
| mmadeforjustine | Finding Flags | 2 | |
| Sajid14592 | Modular Inverting | 25 | |
| rush_i | Monoprime | 30 | |
| xristoforos | Base64 | 10 | |
| Adel_Cr | Legendre Symbol | 35 | |
| hasuke | Confusion through Substitution | 25 | |
| v1ncent | Megalomaniac 3 | 120 | |
| xristoforos | Hex | 5 | |
| xristoforos | ASCII | 5 | |
| 0xmvmd | Modular Arithmetic 1 | 20 | |
| as11 | ASCII | 5 | |
| dlesk | Authenticated Handshake | 40 | |
| as11 | Great Snakes | 3 | |
| Fengziyue | XOR Properties | 15 | |
| shhack96 | Export-grade | 100 | |
| xristoforos | Great Snakes | 3 | |
| as11 | Finding Flags | 2 | |
| xristoforos | Finding Flags | 2 | |
| Kyle_0215 | Modes of Operation Starter | 15 | |
| TinyLean | Keyed Permutations | 5 | |
| 0x595 | Great Snakes | 3 | |
| 0x595 | Finding Flags | 2 | |
| radare | Pad Thai | 80 | |
| emsa | What's a Lattice? | 40 | |
| shhack96 | Parameter Injection | 60 | |
| v1ncent | Megalomaniac 2 | 120 | |
| limac246 | Adrien's Signs | 80 | |
| hasuke | Round Keys | 20 | |
| shhack96 | Deriving Symmetric Keys | 40 |
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