| Date | User | Challenge | Score |
| UserAf | Lemur XOR | 40 | |
| CarrotMoth | Favourite byte | 20 | |
| RDxR10 | Hamiltonicity 2 | 175 | |
| RDxR10 | Hamiltonicity 2 (CryptoHack) | 0 | |
| CarrotMoth | XOR Properties | 15 | |
| asaad12 | RSA Decryption | 20 | |
| malek1230 | Bytes and Big Integers | 10 | |
| xoze | Favourite byte | 20 | |
| Nadim1197 | Base64 | 10 | |
| asaad12 | Private Keys | 20 | |
| Nadim1197 | Hex | 5 | |
| xoze | XOR Properties | 15 | |
| administrator123 | Keyed Permutations | 5 | |
| logy | Modular Binomials | 80 | |
| rehabalmoalimi | CTRIME | 70 | |
| ne_0ly | MDFlag | 125 | |
| ne_0ly | Twin Keys | 100 | |
| ne_0ly | Parameter Injection | 60 | |
| luismota | Base64 | 10 | |
| ne_0ly | Forbidden Fruit | 150 | |
| Nadim1197 | ASCII | 5 | |
| ne_0ly | Beatboxer | 150 | |
| ne_0ly | Oracular Spectacular | 150 | |
| ne_0ly | ECB CBC WTF | 55 | |
| luismota | Hex | 5 | |
| ne_0ly | Passwords as Keys | 50 | |
| reki38 | Adrien's Signs | 80 | |
| Nadim1197 | Great Snakes | 3 | |
| luismota | ASCII | 5 | |
| UserAf | Encoding Challenge | 40 | |
| ndespresso | Bytes and Big Integers | 10 | |
| administrator123 | Great Snakes | 3 | |
| luismota | Great Snakes | 3 | |
| xoze | XOR Starter | 10 | |
| asaad12 | Euler's Totient | 20 | |
| r1ntar0 | XOR Starter | 10 | |
| luismota | Finding Flags | 2 | |
| CarrotMoth | XOR Starter | 10 | |
| reki38 | Chinese Remainder Theorem | 40 | |
| logy | Adrien's Signs | 80 | |
| malek1230 | Base64 | 10 | |
| xoze | Bytes and Big Integers | 10 | |
| logy | Chinese Remainder Theorem | 40 | |
| asaad12 | Public Keys | 15 | |
| MrLi313 | Encoding Challenge | 40 | |
| xoze | Base64 | 10 | |
| zynox | Base64 | 10 | |
| xoze | Hex | 5 | |
| xoze | ASCII | 5 | |
| ne_0ly | Paper Plane | 120 |
You are now level Current level