| Date | User | Challenge | Score |
| anis76 | XOR Properties | 15 | |
| Spuke_228 | Hex | 5 | |
| Ruro | ASCII | 5 | |
| ali2241 | XOR Starter | 10 | |
| vlera | Base64 | 10 | |
| Red_Hive_008 | Finding Flags | 2 | |
| arseniy67 | Hex | 5 | |
| Ugocline | Finding Flags | 2 | |
| K1dnapper | Greatest Common Divisor | 15 | |
| vlera | Hex | 5 | |
| Pyshidza | Base64 | 10 | |
| ali2241 | Bytes and Big Integers | 10 | |
| Dimitris_Toulis | Efficient Exchange | 50 | |
| arseniy67 | ASCII | 5 | |
| Ruro | Great Snakes | 3 | |
| BADWARE | Ron was Wrong, Whit is Right | 90 | |
| 0_0A | Round Keys | 20 | |
| K1dnapper | You either know, XOR you don't | 30 | |
| Egor1sh | Structure of AES | 15 | |
| vlera | ASCII | 5 | |
| Dimitris_Toulis | Curves and Logs | 40 | |
| Ruro | Finding Flags | 2 | |
| Dimitris_Toulis | Scalar Multiplication | 35 | |
| lvcv4y | Modes of Operation Starter | 15 | |
| nullbyte0x00 | Parameter Injection | 60 | |
| Dimitris_Toulis | Point Addition | 30 | |
| K1dnapper | Favourite byte | 20 | |
| lvcv4y | Bringing It All Together | 50 | |
| fersantillan | Keyed Permutations | 5 | |
| arseniy67 | Network Attacks | 5 | |
| HARAHS2510A | ASCII | 5 | |
| 4nd4ir4n | Base64 | 10 | |
| vlera | Great Snakes | 3 | |
| HARAHS2510A | Great Snakes | 3 | |
| P1ssMonkey25 | Greatest Common Divisor | 15 | |
| lvcv4y | Diffusion through Permutation | 30 | |
| dalemopin | Hex | 5 | |
| K1dnapper | XOR Properties | 15 | |
| Spuke_228 | ASCII | 5 | |
| BADWARE | Fast Primes | 75 | |
| 4nd4ir4n | Hex | 5 | |
| 4nd4ir4n | ASCII | 5 | |
| rahaf77 | RSA Decryption | 20 | |
| rahaf77 | Private Keys | 20 | |
| rahaf77 | Euler's Totient | 20 | |
| 4nd4ir4n | Great Snakes | 3 | |
| dalemopin | ASCII | 5 | |
| rahaf77 | Public Keys | 15 | |
| rahaf77 | Modular Exponentiation | 10 | |
| 4nd4ir4n | Finding Flags | 2 |
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