| Date | User | Challenge | Score |
| Lotuli | XOR Starter | 10 | |
| PrincePapaya | Great Snakes | 3 | |
| kubam | Legendre Symbol | 35 | |
| SuK00NA | Hex | 5 | |
| srebrek | Unencryptable | 125 | |
| PrincePapaya | Finding Flags | 2 | |
| goosebud21 | Favourite byte | 20 | |
| LeeShen | Successive Powers | 60 | |
| InTime | Bean Counter | 60 | |
| vKK0b00m87 | Calm Down (HKCERT CTF) | 0 | |
| dpyr | XOR Properties | 15 | |
| alex_rider | Marin's Secrets | 50 | |
| Captain10 | RSA Decryption | 20 | |
| joks | Modular Arithmetic 2 | 20 | |
| alex_rider | Infinite Descent | 50 | |
| goosebud21 | XOR Properties | 15 | |
| erickrivera | Transparency | 50 | |
| Captain10 | Private Keys | 20 | |
| Lotuli | Bytes and Big Integers | 10 | |
| B00177176 | SSH Keys | 35 | |
| shreshth44 | CTRIME | 70 | |
| MadRat_0 | CTRIME | 70 | |
| nghianguyen1703 | XOR Properties | 15 | |
| B00177176 | CERTainly not | 30 | |
| dpyr | XOR Starter | 10 | |
| Captain10 | Euler's Totient | 20 | |
| z3r0xk | No Way JOSE | 20 | |
| Captain10 | Public Keys | 15 | |
| Olivia | Bringing It All Together | 50 | |
| B00177176 | Privacy-Enhanced Mail? | 25 | |
| Captain10 | Modular Exponentiation | 10 | |
| ciphermalware | No Leaks | 100 | |
| ciphermalware | Gotta Go Fast | 40 | |
| conor13rp | Legendre Symbol | 35 | |
| ciphermalware | Invariant | 250 | |
| joks | Modular Arithmetic 1 | 20 | |
| ciphermalware | Mixed Up | 120 | |
| washer2635 | Square Eyes | 35 | |
| ciphermalware | MD0 | 80 | |
| ciphermalware | No Difference | 175 | |
| ErVinuelas | Base64 | 10 | |
| ciphermalware | Twin Keys | 100 | |
| ciphermalware | PriMeD5 | 100 | |
| ciphermalware | Hash Stuffing | 50 | |
| ErVinuelas | Hex | 5 | |
| lidamh | Bytes and Big Integers | 10 | |
| washer2635 | Inferius Prime | 30 | |
| aerofa45 | ASCII | 5 | |
| ciphermalware | Real Curve Crypto | 200 | |
| lucknera | Modular Binomials | 80 |
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