| Date | User | Challenge | Score |
| NKATechnologies | Public Keys | 15 | |
| xX_dyson_Xx | Hex | 5 | |
| jellio04 | Inferius Prime | 30 | |
| NKATechnologies | RSA Signatures | 25 | |
| Sparrow09 | Diffusion through Permutation | 30 | |
| xX_dyson_Xx | ASCII | 5 | |
| NKATechnologies | RSA Decryption | 20 | |
| NKATechnologies | Euler's Totient | 20 | |
| Aloutrance | Modular Exponentiation | 10 | |
| NKATechnologies | Modular Exponentiation | 10 | |
| AbbyK | Finding Flags | 2 | |
| Brisket9528 | Round Keys | 20 | |
| xX_dyson_Xx | Great Snakes | 3 | |
| aetius | Euler's Totient | 20 | |
| Brisket9528 | Structure of AES | 15 | |
| Ba1sars | Quadratic Residues | 25 | |
| Aloutrance | Bean Counter | 60 | |
| Brisket9528 | Resisting Bruteforce | 10 | |
| Brisket9528 | Keyed Permutations | 5 | |
| CKF9091919 | Euler's Totient | 20 | |
| mahir_rahwan | You either know, XOR you don't | 30 | |
| CKF9091919 | Modular Exponentiation | 10 | |
| MaxBursell | You either know, XOR you don't | 30 | |
| jellio04 | Factoring | 15 | |
| tbdang | Square Eyes | 35 | |
| CKF9091919 | Resisting Bruteforce | 10 | |
| CKF9091919 | Keyed Permutations | 5 | |
| jellio04 | RSA Signatures | 25 | |
| CKF9091919 | Modular Inverting | 25 | |
| mahir_rahwan | Favourite byte | 20 | |
| tbdang | Monoprime | 30 | |
| mahir_rahwan | XOR Properties | 15 | |
| xX_dyson_Xx | Finding Flags | 2 | |
| mahir_rahwan | XOR Starter | 10 | |
| toad | Transparency | 50 | |
| tbdang | Inferius Prime | 30 | |
| ioi_ico | Keyed Permutations | 5 | |
| dlesk | Merkle Trees | 25 | |
| toad | SSH Keys | 35 | |
| tbdang | Factoring | 15 | |
| toad | CERTainly not | 30 | |
| ch1sk3ly | Sharks on the Wire | 10 | |
| mahir_rahwan | Bytes and Big Integers | 10 | |
| southernsoprano | Bytes and Big Integers | 10 | |
| ch1sk3ly | Secure Protocols | 5 | |
| toad | Privacy-Enhanced Mail? | 25 | |
| ch1sk3ly | JSON in JSON | 40 | |
| Sparrow09 | Confusion through Substitution | 25 | |
| jellio04 | RSA Decryption | 20 | |
| tbdang | RSA Signatures | 25 |
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