| Date | User | Challenge | Score |
| 151115 | Modular Arithmetic 2 | 20 | |
| 151115 | Modular Arithmetic 1 | 20 | |
| 151115 | Extended GCD | 20 | |
| kotoko | Bytes and Big Integers | 10 | |
| 151115 | Greatest Common Divisor | 15 | |
| z4ibi | Modular Arithmetic 1 | 20 | |
| ivan4x | You either know, XOR you don't | 30 | |
| bu_gye_jeong | Structure of AES | 15 | |
| ivan4x | Favourite byte | 20 | |
| ivan4x | XOR Properties | 15 | |
| starplatinum | Base64 | 10 | |
| ivan4x | XOR Starter | 10 | |
| ivan4x | Bytes and Big Integers | 10 | |
| ivan4x | Base64 | 10 | |
| ivan4x | Hex | 5 | |
| nmonar1 | Bean Counter | 60 | |
| melvin123_4 | Symmetry | 50 | |
| pufik404 | Monoprime | 30 | |
| nmonar1 | Symmetry | 50 | |
| melvin123_4 | Flipping Cookie | 60 | |
| nmonar1 | Flipping Cookie | 60 | |
| 151115 | You either know, XOR you don't | 30 | |
| melvin123_4 | ECB CBC WTF | 55 | |
| 151115 | Favourite byte | 20 | |
| z4ibi | Extended GCD | 20 | |
| 151115 | XOR Properties | 15 | |
| melvin123_4 | ECB Oracle | 60 | |
| 151115 | XOR Starter | 10 | |
| Camelot51 | XOR Properties | 15 | |
| 151115 | Bytes and Big Integers | 10 | |
| nmonar1 | ECB CBC WTF | 55 | |
| melvin123_4 | Passwords as Keys | 50 | |
| 151115 | Base64 | 10 | |
| kotoko | Base64 | 10 | |
| ivan4x | ASCII | 5 | |
| nmonar1 | ECB Oracle | 60 | |
| ivan4x | Great Snakes | 3 | |
| nmonar1 | Passwords as Keys | 50 | |
| cysa066 | Base64 | 10 | |
| JGaspar | Background Reading | 5 | |
| nmonar1 | Modes of Operation Starter | 15 | |
| piotterek | Base64 | 10 | |
| nmonar1 | Bringing It All Together | 50 | |
| cysa066 | Hex | 5 | |
| karl0408 | Chinese Remainder Theorem | 40 | |
| LizaEYE | Hex | 5 | |
| KayCipher | ASCII | 5 | |
| PotatoRadio | ECB CBC WTF | 55 | |
| representativepi | Base64 | 10 | |
| ivan4x | Finding Flags | 2 |
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