| Date | User | Challenge | Score |
| Oblivi0n | Privacy-Enhanced Mail? | 25 | |
| malak13 | Base64 | 10 | |
| lucas123456789 | Finding Flags | 2 | |
| sajadhamza | Hex | 5 | |
| User0069 | Hamiltonicity 2 | 175 | |
| b1b00www | Cofactor Cofantasy | 150 | |
| kyalo | Bean Counter | 60 | |
| Oblivi0n | Lemur XOR | 40 | |
| rajforlearn83 | Manyprime | 40 | |
| labyrinth0 | Base64 | 10 | |
| semisweetdude | Factoring | 15 | |
| Oblivi0n | Encoding Challenge | 40 | |
| 1cecily | Finding Flags | 2 | |
| WhatWasThat | Modular Arithmetic 2 | 20 | |
| kyalo | Symmetry | 50 | |
| labyrinth0 | Hex | 5 | |
| AradCoh | Non-Interactive | 35 | |
| yeshu30 | ASCII | 5 | |
| labyrinth0 | ASCII | 5 | |
| khanhdaoduy2k7 | Hex | 5 | |
| katanabeneficial | Bean Counter | 60 | |
| yeshu30 | Great Snakes | 3 | |
| kyalo | Flipping Cookie | 60 | |
| labyrinth0 | Great Snakes | 3 | |
| User0069 | Hamiltonicity 2 (CryptoHack) | 0 | |
| labyrinth0 | Finding Flags | 2 | |
| khanhdaoduy2k7 | ASCII | 5 | |
| yonion_45 | Finding Flags | 2 | |
| WhatWasThat | Modular Arithmetic 1 | 20 | |
| khanhdaoduy2k7 | Great Snakes | 3 | |
| WhatWasThat | Extended GCD | 20 | |
| khanhdaoduy2k7 | Finding Flags | 2 | |
| l3th4l | Proofs of Knowledge | 20 | |
| malak13 | Hex | 5 | |
| 0xMinhT | ProSign 3 | 100 | |
| codemutt | Quadratic Residues | 25 | |
| ThinkInTheBox | Cofactor Cofantasy | 150 | |
| ellie_m | Modular Arithmetic 2 | 20 | |
| kyalo | ECB CBC WTF | 55 | |
| larifari | Background Reading | 5 | |
| kacpersowka | Euler's Totient | 20 | |
| kyalo | ECB Oracle | 60 | |
| WhatWasThat | Greatest Common Divisor | 15 | |
| ellie_m | Modular Arithmetic 1 | 20 | |
| sedami | You either know, XOR you don't | 30 | |
| lyh | You either know, XOR you don't | 30 | |
| kyalo | Passwords as Keys | 50 | |
| sedami | Favourite byte | 20 | |
| Oblivi0n | Moving Problems | 150 | |
| WhatWasThat | You either know, XOR you don't | 30 |
You are now level Current level