| Date | User | Challenge | Score |
| SARAH2 | Modular Arithmetic 1 | 20 | |
| SARAH2 | Extended GCD | 20 | |
| SARAH2 | Greatest Common Divisor | 15 | |
| pjmgc | Symmetry | 50 | |
| SARAH2 | Lemur XOR | 40 | |
| randomusername_0 | Factoring | 15 | |
| kaleidooa | ECB Oracle | 60 | |
| danosito | Lemur XOR | 40 | |
| Unifl0s | Hex | 5 | |
| SARAH2 | You either know, XOR you don't | 30 | |
| gennadion | Quadratic Residues | 25 | |
| shr1_kumr | Greatest Common Divisor | 15 | |
| jinseo | Modes of Operation Starter | 15 | |
| danosito | Encoding Challenge | 40 | |
| sulkycat | Structure of AES | 15 | |
| caffeine27 | Flipping Cookie | 60 | |
| littleseal26 | ECB CBC WTF | 55 | |
| seungjae2023 | ECB Oracle | 60 | |
| soleman | You either know, XOR you don't | 30 | |
| gennadion | Modular Inverting | 25 | |
| greenhaze | Network Attacks | 5 | |
| greenhaze | You either know, XOR you don't | 30 | |
| kratta | Factoring | 15 | |
| greenhaze | Favourite byte | 20 | |
| caffeine27 | ECB Oracle | 60 | |
| danosito | Network Attacks | 5 | |
| phanvanven | Favourite byte | 20 | |
| aayshush | Legendre Symbol | 35 | |
| kratta | RSA Signatures | 25 | |
| greenhaze | XOR Properties | 15 | |
| danosito | You either know, XOR you don't | 30 | |
| mauust | Export-grade | 100 | |
| jinseo | Bringing It All Together | 50 | |
| danosito | Favourite byte | 20 | |
| kratta | RSA Decryption | 20 | |
| Sungyeon | Export-grade | 100 | |
| danosito | XOR Properties | 15 | |
| greenhaze | XOR Starter | 10 | |
| Sungyeon | Parameter Injection | 60 | |
| Sungyeon | Deriving Symmetric Keys | 40 | |
| greenhaze | Bytes and Big Integers | 10 | |
| kmark | Euler's Totient | 20 | |
| Sungyeon | Computing Shared Secrets | 30 | |
| Unifl0s | ASCII | 5 | |
| Sungyeon | Computing Public Values | 25 | |
| greenhaze | Base64 | 10 | |
| greenhaze | Hex | 5 | |
| Sungyeon | Generators of Groups | 20 | |
| greenhaze | ASCII | 5 | |
| Sungyeon | Working with Fields | 10 |
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