| Date | User | Challenge | Score |
| XR3Y | Smooth Criminal | 60 | |
| kapitano | Favourite byte | 20 | |
| Bagadan | Resisting Bruteforce | 10 | |
| ilovecryto | ASCII | 5 | |
| Bagadan | Keyed Permutations | 5 | |
| Blackgreen | Modular Square Root | 35 | |
| Galois | Elliptic Nodes | 150 | |
| ilovecryto | Great Snakes | 3 | |
| ilovecryto | Finding Flags | 2 | |
| SashaB | Bytes and Big Integers | 10 | |
| LBN789 | RSA Decryption | 20 | |
| SashaB | Base64 | 10 | |
| nihhajawarembang | Manyprime | 40 | |
| cryptohack720 | Passwords as Keys | 50 | |
| reutoelboum | Mixed Up | 120 | |
| SashaB | Hex | 5 | |
| kapitano | XOR Properties | 15 | |
| SashaB | ASCII | 5 | |
| shprota | Resisting Bruteforce | 10 | |
| SashaB | Great Snakes | 3 | |
| SashaB | Finding Flags | 2 | |
| shprota | Keyed Permutations | 5 | |
| Regnm0ln1 | Parameter Injection | 60 | |
| paknathuch | Modular Arithmetic 1 | 20 | |
| paknathuch | Extended GCD | 20 | |
| LBN789 | Private Keys | 20 | |
| paknathuch | Greatest Common Divisor | 15 | |
| oiu890 | Everything is Still Big | 100 | |
| paknathuch | You either know, XOR you don't | 30 | |
| cryptohack720 | Modes of Operation Starter | 15 | |
| paknathuch | Favourite byte | 20 | |
| paknathuch | XOR Properties | 15 | |
| oiu890 | Crossed Wires | 100 | |
| paknathuch | XOR Starter | 10 | |
| paknathuch | Bytes and Big Integers | 10 | |
| Tuananh | Everything is Big | 70 | |
| paknathuch | Base64 | 10 | |
| Idkwhattowrite | Finding Flags | 2 | |
| Regnm0ln1 | Deriving Symmetric Keys | 40 | |
| DingusDonda | You either know, XOR you don't | 30 | |
| DingusDonda | Favourite byte | 20 | |
| securial150 | Jack's Birthday Confusion | 30 | |
| Regnm0ln1 | Computing Shared Secrets | 30 | |
| DingusDonda | XOR Properties | 15 | |
| securial150 | Jack's Birthday Hash | 20 | |
| Staroll | Quadratic Residues | 25 | |
| Regnm0ln1 | Computing Public Values | 25 | |
| LeeWangWy | Background Reading | 5 | |
| AndreaMuscarella | Bean Counter | 60 | |
| LeeWangWy | Find the Lattice | 100 |
You are now level Current level