| Date | User | Challenge | Score |
| mOhanaa | Base64 | 10 | |
| PtCa_1407_hck_cr | Finding Flags | 2 | |
| Darkking | Finding Flags | 2 | |
| Sygon_Kk08 | XOR Properties | 15 | |
| vigid | Finding Flags | 2 | |
| ducp1t0oo | Favourite byte | 20 | |
| userdead | Finding Flags | 2 | |
| wh77 | Modular Inverting | 25 | |
| ducp1t0oo | XOR Properties | 15 | |
| ABHAMIDI | ASCII | 5 | |
| Cerades | Bruce Schneier's Password | 100 | |
| ducp1t0oo | XOR Starter | 10 | |
| ABHAMIDI | Great Snakes | 3 | |
| LACiA | Static Client 2 | 120 | |
| wh77 | Modular Arithmetic 2 | 20 | |
| ABHAMIDI | Finding Flags | 2 | |
| Cerades | Toshi's Treasure | 150 | |
| mOhanaa | Hex | 5 | |
| wh77 | Modular Arithmetic 1 | 20 | |
| ducp1t0oo | Bytes and Big Integers | 10 | |
| LACiA | Additive | 70 | |
| wh77 | Extended GCD | 20 | |
| ahmed1hossam | Extended GCD | 20 | |
| wh77 | Greatest Common Divisor | 15 | |
| Sygon_Kk08 | XOR Starter | 10 | |
| ducp1t0oo | Base64 | 10 | |
| ducp1t0oo | Hex | 5 | |
| ngynmq | RSA vs RNG | 150 | |
| ducp1t0oo | ASCII | 5 | |
| wh77 | You either know, XOR you don't | 30 | |
| LACiA | Static Client | 100 | |
| jnhe | Too Honest | 50 | |
| Cerades | Armory | 100 | |
| anaoej | ASCII | 5 | |
| ducp1t0oo | Great Snakes | 3 | |
| mOhanaa | ASCII | 5 | |
| anwar21_21 | Twin Keys | 100 | |
| anwar21_21 | No Difference | 175 | |
| anwar21_21 | MD0 | 80 | |
| ngynmq | No Leaks | 100 | |
| Cerades | Bit by Bit | 100 | |
| anwar21_21 | MDFlag | 125 | |
| ducp1t0oo | Finding Flags | 2 | |
| anwar21_21 | Mixed Up | 120 | |
| Cerades | LFSR Destroyer | 250 | |
| anwar21_21 | Invariant | 250 | |
| LACiA | Export-grade | 100 | |
| Sygon_Kk08 | Bytes and Big Integers | 10 | |
| anaoej | Great Snakes | 3 | |
| FeisterWheat67 | Finding Flags | 2 |
You are now level Current level