| Date | User | Challenge | Score |
| acetij | Bytes and Big Integers | 10 | |
| nadavk100 | Let's Decrypt | 80 | |
| Y0N3S | XOR Properties | 15 | |
| Celcious | Special Soundness | 25 | |
| desa_05 | Export-grade | 100 | |
| cak3man | ECB CBC WTF | 55 | |
| acetij | Base64 | 10 | |
| Amr_Mohsen | Modular Arithmetic 2 | 20 | |
| nadavk100 | Signing Server | 60 | |
| sdigs | Salty | 20 | |
| dydevx | Modular Inverting | 25 | |
| acetij | Hex | 5 | |
| desa_05 | Parameter Injection | 60 | |
| Celcious | Proofs of Knowledge | 20 | |
| osan | Lemur XOR | 40 | |
| Ah_Crypto2 | Modular Square Root | 35 | |
| VamonosYa | Finding Flags | 2 | |
| 1101001 | Base64 | 10 | |
| lasagnezio | Modular Square Root | 35 | |
| rakshas | Chinese Remainder Theorem | 40 | |
| desa_05 | Deriving Symmetric Keys | 40 | |
| PatrickL_SC | Gaussian Reduction | 50 | |
| Celcious | ZKP Introduction | 5 | |
| dj03091986 | Base64 | 10 | |
| desa_05 | Computing Shared Secrets | 30 | |
| Amr_Mohsen | Modular Arithmetic 1 | 20 | |
| rakshas | Modular Square Root | 35 | |
| osan | You either know, XOR you don't | 30 | |
| dj03091986 | Hex | 5 | |
| desa_05 | Computing Public Values | 25 | |
| rakshas | Legendre Symbol | 35 | |
| dj03091986 | ASCII | 5 | |
| tobiasriesen | XOR Properties | 15 | |
| dj03091986 | Great Snakes | 3 | |
| dj03091986 | Finding Flags | 2 | |
| jeiszs | Base64 | 10 | |
| desa_05 | Generators of Groups | 20 | |
| brembo | Structure of AES | 15 | |
| rxthorn | RSA Decryption | 20 | |
| Y0N3S | XOR Starter | 10 | |
| tobiasriesen | XOR Starter | 10 | |
| brembo | Resisting Bruteforce | 10 | |
| greysneakthief | You either know, XOR you don't | 30 | |
| brembo | Keyed Permutations | 5 | |
| rxthorn | Private Keys | 20 | |
| jeiszs | Hex | 5 | |
| jeiszs | ASCII | 5 | |
| rxthorn | Euler's Totient | 20 | |
| tobiasriesen | Bytes and Big Integers | 10 | |
| rxthorn | Public Keys | 15 |
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