| Date | User | Challenge | Score |
| flyff934 | Finding Flags | 2 | |
| 151115 | Public Keys | 15 | |
| nimo08 | Great Snakes | 3 | |
| 151115 | Modular Exponentiation | 10 | |
| CYCcc | Salty | 20 | |
| prajwalgn03 | Confusion through Substitution | 25 | |
| aminkedri | Privacy-Enhanced Mail? | 25 | |
| justahuman | Great Snakes | 3 | |
| myothidahtun | Favourite byte | 20 | |
| jgdugo | You either know, XOR you don't | 30 | |
| Sa2006 | Hex | 5 | |
| Sa2006 | ASCII | 5 | |
| Moravanith | Base64 | 10 | |
| jgdugo | Favourite byte | 20 | |
| Miraj10 | Hex | 5 | |
| Moravanith | Hex | 5 | |
| oel12021 | Great Snakes | 3 | |
| Hieptrau | SSH Keys | 35 | |
| Sa2006 | Network Attacks | 5 | |
| eternelman | Flipping Cookie | 60 | |
| Moravanith | ASCII | 5 | |
| dragon99 | Favourite byte | 20 | |
| CyberEX | Favourite byte | 20 | |
| dragon99 | XOR Properties | 15 | |
| aminkedri | Adrien's Signs | 80 | |
| SylvainOdhiambo | Factoring | 15 | |
| Hieptrau | CERTainly not | 30 | |
| CYCcc | Manyprime | 40 | |
| myothidahtun | XOR Properties | 15 | |
| Fluffycoal | Export-grade | 100 | |
| Sa2006 | Great Snakes | 3 | |
| Fluffycoal | Parameter Injection | 60 | |
| oel12021 | Finding Flags | 2 | |
| aminkedri | Chinese Remainder Theorem | 40 | |
| Sa2006 | Finding Flags | 2 | |
| Hieptrau | Privacy-Enhanced Mail? | 25 | |
| Miraj10 | ASCII | 5 | |
| prajwalgn03 | Round Keys | 20 | |
| fardosaAlinur12 | Private Keys | 20 | |
| dragon99 | XOR Starter | 10 | |
| fardosaAlinur12 | Euler's Totient | 20 | |
| fardosaAlinur12 | Public Keys | 15 | |
| fardosaAlinur12 | Modular Exponentiation | 10 | |
| Math | Greatest Common Divisor | 15 | |
| dragon99 | Bytes and Big Integers | 10 | |
| ayget | You either know, XOR you don't | 30 | |
| dragon99 | Base64 | 10 | |
| dragon99 | Hex | 5 | |
| SylvainOdhiambo | RSA Signatures | 25 | |
| dragon99 | ASCII | 5 |
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