| Date | User | Challenge | Score |
| sharon223085 | Modular Binomials | 80 | |
| victorbuch | Euler's Totient | 20 | |
| MegaOlm | Hex | 5 | |
| kataracz | Hex | 5 | |
| Arsh65 | Favourite byte | 20 | |
| 0xB4DFL4G | Structure of AES | 15 | |
| PunooKhan | Greatest Common Divisor | 15 | |
| hfdsjkhfkjhaskjf | Private Keys | 20 | |
| Muteki | XOR Starter | 10 | |
| sharon223085 | Adrien's Signs | 80 | |
| annalisa | Micro Transmissions | 120 | |
| Kis_0_0 | Great Snakes | 3 | |
| Arsh65 | XOR Properties | 15 | |
| dijarselami | Favourite byte | 20 | |
| sharon223085 | Chinese Remainder Theorem | 40 | |
| L434 | Extended GCD | 20 | |
| victorbuch | Public Keys | 15 | |
| Arsh65 | XOR Starter | 10 | |
| Kis_0_0 | Finding Flags | 2 | |
| victorbuch | Modular Exponentiation | 10 | |
| eksen | Hex | 5 | |
| sharon223085 | Legendre Symbol | 35 | |
| victorbuch | Modular Inverting | 25 | |
| hasnaa | Confusion through Substitution | 25 | |
| hasnaa | Diffusion through Permutation | 30 | |
| hasnaa | Bringing It All Together | 50 | |
| eksen | ASCII | 5 | |
| sharon223085 | Quadratic Residues | 25 | |
| 0xB4DFL4G | Resisting Bruteforce | 10 | |
| Muteki | Bytes and Big Integers | 10 | |
| nosacrypt | Hex | 5 | |
| HaxL0p4 | Modular Square Root | 35 | |
| Amro_Hussein | Unencryptable | 125 | |
| Arsh65 | Bytes and Big Integers | 10 | |
| 0xB4DFL4G | Keyed Permutations | 5 | |
| AKONCHELLAH | Modular Inverting | 25 | |
| dijarselami | XOR Properties | 15 | |
| swan_nessie | Jack's Birthday Confusion | 30 | |
| 24BECSE19_DT | Find the Lattice | 100 | |
| victorbuch | Modular Arithmetic 2 | 20 | |
| driftune | Base64 | 10 | |
| 24BECSE19_DT | Gaussian Reduction | 50 | |
| 24BECSE19_DT | What's a Lattice? | 40 | |
| blavkice | RSA Decryption | 20 | |
| kataracz | ASCII | 5 | |
| sunimalive | Euler's Totient | 20 | |
| driftune | Hex | 5 | |
| Arsh65 | Base64 | 10 | |
| estudiantemma | XOR Starter | 10 | |
| victorbuch | Modular Arithmetic 1 | 20 |
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