| Date | User | Challenge | Score |
| zhanghanwen | Chinese Remainder Theorem | 40 | |
| zhanghanwen | Quadratic Residues | 25 | |
| labcoxyzl | Lemur XOR | 40 | |
| deutschebank | Great Snakes | 3 | |
| zhanghanwen | Round Keys | 20 | |
| zhanghanwen | Resisting Bruteforce | 10 | |
| zhanghanwen | Keyed Permutations | 5 | |
| labcoxyzl | You either know, XOR you don't | 30 | |
| zhanghanwen | Modular Arithmetic 2 | 20 | |
| zhanghanwen | Modular Arithmetic 1 | 20 | |
| labcoxyzl | Favourite byte | 20 | |
| labcoxyzl | XOR Properties | 15 | |
| zhanghanwen | Network Attacks | 5 | |
| labcoxyzl | XOR Starter | 10 | |
| labcoxyzl | Encoding Challenge | 40 | |
| labcoxyzl | Base64 | 10 | |
| labcoxyzl | Bytes and Big Integers | 10 | |
| labcoxyzl | Hex | 5 | |
| labcoxyzl | ASCII | 5 | |
| labcoxyzl | Network Attacks | 5 | |
| labcoxyzl | Great Snakes | 3 | |
| labcoxyzl | Finding Flags | 2 | |
| shynnevilla | Network Attacks | 5 | |
| Nikolai16 | Finding Flags | 2 | |
| cube567 | Base64 | 10 | |
| cube567 | Hex | 5 | |
| luwofi | Dancing Queen | 120 | |
| cube567 | ASCII | 5 | |
| cube567 | Great Snakes | 3 | |
| cube567 | Finding Flags | 2 | |
| mwkim | Finding Flags | 2 | |
| Sdrv | Finding Flags | 2 | |
| dachDelat | Base64 | 10 | |
| dachDelat | Hex | 5 | |
| cleim | ASCII | 5 | |
| dachDelat | ASCII | 5 | |
| umaibouzu | Greatest Common Divisor | 15 | |
| hakka52 | Bruce Schneier's Password | 100 | |
| cleim | Token Appreciation | 5 | |
| hakka52 | Trust Games | 150 | |
| dachDelat | Great Snakes | 3 | |
| fazslll | Extended GCD | 20 | |
| aure25 | ASCII | 5 | |
| fazslll | Greatest Common Divisor | 15 | |
| dachDelat | Finding Flags | 2 | |
| Yacien | XOR Starter | 10 | |
| j4nnlk | Modular Arithmetic 1 | 20 | |
| gugugaga | Finding Flags | 2 | |
| j4nnlk | Extended GCD | 20 | |
| aure25 | Great Snakes | 3 |
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