| Date | User | Challenge | Score |
| krodo | Great Snakes | 3 | |
| krodo | Finding Flags | 2 | |
| cell3ry | RSA Decryption | 20 | |
| snachkz | Base64 | 10 | |
| jkendall | Euler's Totient | 20 | |
| Vanish | What's My Kernel | 70 | |
| jkendall | Public Keys | 15 | |
| jkendall | Modular Exponentiation | 10 | |
| condoriano | Keyed Permutations | 5 | |
| jkendall | Bean Counter | 60 | |
| curry_And_Rice | Curves and Logs | 40 | |
| MarcosV | Favourite byte | 20 | |
| Bigmac | You either know, XOR you don't | 30 | |
| Bigmac | Favourite byte | 20 | |
| snachkz | Hex | 5 | |
| d3f4ult2_0 | Adrien's Signs | 80 | |
| snachkz | ASCII | 5 | |
| Zebr0s | XOR Starter | 10 | |
| Bigmac | XOR Properties | 15 | |
| snachkz | Great Snakes | 3 | |
| Bigmac | Bytes and Big Integers | 10 | |
| snachkz | Finding Flags | 2 | |
| jkendall | Symmetry | 50 | |
| ub_krypto_25_12 | You either know, XOR you don't | 30 | |
| Zebr0s | Bytes and Big Integers | 10 | |
| Zebr0s | Base64 | 10 | |
| ub_krypto_25_12 | Lemur XOR | 40 | |
| Zebr0s | Hex | 5 | |
| Bigmac | XOR Starter | 10 | |
| ub_krypto_25_12 | Favourite byte | 20 | |
| Joe_Erl | ASCII | 5 | |
| Zebr0s | ASCII | 5 | |
| ub_krypto_25_12 | XOR Properties | 15 | |
| Zebr0s | Great Snakes | 3 | |
| Zebr0s | Finding Flags | 2 | |
| Joe_Erl | Great Snakes | 3 | |
| Joe_Erl | Finding Flags | 2 | |
| MarcosV | XOR Properties | 15 | |
| d3f4ult2_0 | Chinese Remainder Theorem | 40 | |
| ub_krypto_25_12 | XOR Starter | 10 | |
| ub_krypto_25_12 | Keyed Permutations | 5 | |
| Mounirmuhammad | ASCII | 5 | |
| 0x3af72 | Resisting Bruteforce | 10 | |
| Mounirmuhammad | Great Snakes | 3 | |
| 0x3af72 | Keyed Permutations | 5 | |
| Mounirmuhammad | Finding Flags | 2 | |
| deathknight | Montgomery Curves | 30 | |
| deathknight | Where's the Supersingular Curve | 25 | |
| deathknight | Image Point Arithmetic | 30 | |
| deathknight | The j-invariant | 20 |
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