| Date | User | Challenge | Score |
| hau23 | ASCII | 5 | |
| jayola | ASCII | 5 | |
| pmk1d | Lemur XOR | 40 | |
| ahmedmario | Confusion through Substitution | 25 | |
| pmk1d | Encoding Challenge | 40 | |
| ronnyl | Logon Zero | 80 | |
| alexander_alex | Favourite byte | 20 | |
| sfo | Resisting Bruteforce | 10 | |
| j_wlodarz | RSA Backdoor Viability | 175 | |
| j_wlodarz | Ron was Wrong, Whit is Right | 90 | |
| pmk1d | Network Attacks | 5 | |
| pmk1d | You either know, XOR you don't | 30 | |
| nurminen | The Matrix Reloaded | 100 | |
| d4pr0 | Backpack Cryptography | 120 | |
| Ryusz | XOR Properties | 15 | |
| Thaimeo2006 | Resisting Bruteforce | 10 | |
| zyb12344 | Legendre Symbol | 35 | |
| pmk1d | Favourite byte | 20 | |
| pmk1d | XOR Properties | 15 | |
| zyb12344 | Quadratic Residues | 25 | |
| medb | OR Proof (CryptoHack) | 0 | |
| medb | OR Proof | 75 | |
| nurminen | The Matrix | 75 | |
| pmk1d | XOR Starter | 10 | |
| nurminen | Static Client 2 | 120 | |
| nurminen | Static Client | 100 | |
| ellieh | Export-grade | 100 | |
| ellieh | Parameter Injection | 60 | |
| DavidTruong | Flipping Cookie | 60 | |
| ellieh | Deriving Symmetric Keys | 40 | |
| zyb12344 | Modular Inverting | 25 | |
| Unbekannt | Point Negation | 10 | |
| kqaddour | JSON in JSON | 40 | |
| zyb12344 | Modular Arithmetic 2 | 20 | |
| ellieh | Computing Shared Secrets | 30 | |
| nurminen | Export-grade | 100 | |
| aakansh_m | Resisting Bruteforce | 10 | |
| zyb12344 | Modular Arithmetic 1 | 20 | |
| ellieh | Computing Public Values | 25 | |
| pmk1d | Bytes and Big Integers | 10 | |
| zyb12344 | Extended GCD | 20 | |
| aakansh_m | Keyed Permutations | 5 | |
| nurminen | Cofactor Cofantasy | 150 | |
| zyb12344 | Greatest Common Divisor | 15 | |
| zyb12344 | You either know, XOR you don't | 30 | |
| Unbekannt | Background Reading | 5 | |
| pmk1d | Base64 | 10 | |
| vikas_nagori21 | Triple DES | 60 | |
| pmk1d | Hex | 5 | |
| pmk1d | ASCII | 5 |
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