| Date | User | Challenge | Score |
| pcy0559 | ASCII | 5 | |
| Juriaa | Structure of AES | 15 | |
| lebigjc | Finding Flags | 2 | |
| xydraa | RSA Decryption | 20 | |
| anchi1228 | Keyed Permutations | 5 | |
| Gokongggggggg | Greatest Common Divisor | 15 | |
| pcy0559 | Great Snakes | 3 | |
| geovani | Finding Flags | 2 | |
| pcy0559 | Finding Flags | 2 | |
| User0069 | Broken RSA | 100 | |
| rokhayaa | Hex | 5 | |
| ireng | Structure of AES | 15 | |
| Saschatouille | Authenticated Handshake | 40 | |
| LinusL | Bringing It All Together | 50 | |
| Yu_212 | Missing Modulus | 80 | |
| B3k | XOR Starter | 10 | |
| Nyanamba | Greatest Common Divisor | 15 | |
| gwpro | Background Reading | 5 | |
| medb | Gotta Go Fast | 40 | |
| DavidTruong | Deriving Symmetric Keys | 40 | |
| Jan_H | Bringing It All Together | 50 | |
| DiShaineee | Modular Inverting | 25 | |
| anchi1228 | Modular Binomials | 80 | |
| ireng | Jack's Birthday Confusion | 30 | |
| hyoonqt | Euler's Totient | 20 | |
| gwpro | Script Kiddie | 70 | |
| nhatminh_dz2k7 | Public Keys | 15 | |
| ireng | Jack's Birthday Hash | 20 | |
| Nyanamba | You either know, XOR you don't | 30 | |
| ved_007 | Export-grade | 100 | |
| DiShaineee | Modular Arithmetic 2 | 20 | |
| B3k | Base64 | 10 | |
| Nyanamba | Favourite byte | 20 | |
| nhatminh_dz2k7 | Modular Exponentiation | 10 | |
| Nyanamba | XOR Properties | 15 | |
| Wiskundeles | XOR Properties | 15 | |
| Nyanamba | XOR Starter | 10 | |
| ireng | ASCII | 5 | |
| Nyanamba | Bytes and Big Integers | 10 | |
| lostaspectjbl | Structure of AES | 15 | |
| ireng | Network Attacks | 5 | |
| Nyanamba | Base64 | 10 | |
| Phasal | Great Snakes | 3 | |
| Phasal | Finding Flags | 2 | |
| Nyanamba | Hex | 5 | |
| gwpro | Additive | 70 | |
| ireng | Great Snakes | 3 | |
| Nyanamba | ASCII | 5 | |
| DiShaineee | Modular Arithmetic 1 | 20 | |
| pilotjoker999 | Flipping Cookie | 60 |
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