| Date | User | Challenge | Score |
| zgd909 | Triple DES | 60 | |
| zgd909 | Lazy CBC | 60 | |
| zgd909 | Flipping Cookie | 60 | |
| zgd909 | ECB Oracle | 60 | |
| ShadowVip08 | Base64 | 10 | |
| michkied | WOTS Up 2 | 90 | |
| hyperkahler | ASCII | 5 | |
| rikuland | Scalar Multiplication | 35 | |
| zgd909 | ECB CBC WTF | 55 | |
| antony_negr | ASCII | 5 | |
| Patonymous | Lazy CBC | 60 | |
| zgd909 | Passwords as Keys | 50 | |
| antony_negr | Great Snakes | 3 | |
| That11thHarmonic | ECB CBC WTF | 55 | |
| antony_negr | Finding Flags | 2 | |
| cutiepie | Resisting Bruteforce | 10 | |
| ShadowVip08 | Hex | 5 | |
| zgd909 | Modes of Operation Starter | 15 | |
| zgd909 | Bringing It All Together | 50 | |
| ShadowVip08 | ASCII | 5 | |
| hyperkahler | Great Snakes | 3 | |
| UtkarshBabar | Hex | 5 | |
| michalov7 | Resisting Bruteforce | 10 | |
| michalov7 | Keyed Permutations | 5 | |
| Janek0 | Diffusion through Permutation | 30 | |
| mathiasvatnehol | Base64 | 10 | |
| cutiepie | Keyed Permutations | 5 | |
| skiller3478 | Modular Arithmetic 1 | 20 | |
| anynomous | XOR Starter | 10 | |
| mathiasvatnehol | Hex | 5 | |
| skiller3478 | Extended GCD | 20 | |
| skiller3478 | Greatest Common Divisor | 15 | |
| hwan | Special Soundness | 25 | |
| mathiasvatnehol | ASCII | 5 | |
| hyperkahler | Finding Flags | 2 | |
| xxvpb51145 | Hex | 5 | |
| Pedro_aug | Bytes and Big Integers | 10 | |
| anynomous | Bytes and Big Integers | 10 | |
| Biplab | You either know, XOR you don't | 30 | |
| xxvpb51145 | ASCII | 5 | |
| pppp | Moving Problems | 150 | |
| loafiee | Curves and Logs | 40 | |
| xxvpb51145 | Network Attacks | 5 | |
| Janek0 | Confusion through Substitution | 25 | |
| anynomous | Base64 | 10 | |
| loafiee | Scalar Multiplication | 35 | |
| trovsmisqwsro | Diffusion through Permutation | 30 | |
| rikuland | Point Addition | 30 | |
| calvernaz | WOTS Up 2 | 90 | |
| loafiee | Broken RSA | 100 |
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