| Date | User | Challenge | Score |
| TideHue | Modular Binomials | 80 | |
| caeno123 | Hex | 5 | |
| Pucc3 | Base64 | 10 | |
| nnxstnt | ECB Oracle | 60 | |
| Pucc3 | Hex | 5 | |
| TideHue | Euler's Totient | 20 | |
| starunity | Euler's Totient | 20 | |
| qwra | Encoding Challenge | 40 | |
| Pucc3 | ASCII | 5 | |
| wyyao | XOR Properties | 15 | |
| TideHue | Public Keys | 15 | |
| TideHue | Modular Exponentiation | 10 | |
| TideHue | Successive Powers | 60 | |
| caeno123 | ASCII | 5 | |
| Emzee | XOR Properties | 15 | |
| Pucc3 | Great Snakes | 3 | |
| Pucc3 | Finding Flags | 2 | |
| Huobase | Bruce Schneier's Password: Part 2 | 250 | |
| TideHue | Diffusion through Permutation | 30 | |
| TideHue | Confusion through Substitution | 25 | |
| Collins_K | Triple DES | 60 | |
| TideHue | Round Keys | 20 | |
| Collins_K | Lazy CBC | 60 | |
| JohanAlvin | Base64 | 10 | |
| wyyao | XOR Starter | 10 | |
| TideHue | Structure of AES | 15 | |
| trianglehead | Bytes and Big Integers | 10 | |
| TideHue | Resisting Bruteforce | 10 | |
| Collins_K | Transparency | 50 | |
| Collins_Gitonga | Structure of AES | 15 | |
| TideHue | Keyed Permutations | 5 | |
| Collins_Gitonga | Resisting Bruteforce | 10 | |
| Collins_K | SSH Keys | 35 | |
| Collins_Gitonga | Keyed Permutations | 5 | |
| JohanAlvin | Hex | 5 | |
| JohanAlvin | ASCII | 5 | |
| TideHue | Network Attacks | 5 | |
| Wanjiku_136536 | Bean Counter | 60 | |
| Collins_K | CERTainly not | 30 | |
| aravhacks | Finding Flags | 2 | |
| Emzee | XOR Starter | 10 | |
| Wanjiku_136536 | Symmetry | 50 | |
| Collins_K | Privacy-Enhanced Mail? | 25 | |
| MickeyBity54w | Symmetry | 50 | |
| starunity | Public Keys | 15 | |
| Collins_K | Lemur XOR | 40 | |
| MickeyBity54w | Bean Counter | 60 | |
| jeydpbb | Flipping Cookie | 60 | |
| Collins_K | Network Attacks | 5 | |
| Wanjiku_136536 | Flipping Cookie | 60 |
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