| Date | User | Challenge | Score |
| TMKAK47 | Keyed Permutations | 5 | |
| cryptohacker_101 | Modular Arithmetic 2 | 20 | |
| TMKAK47 | Greatest Common Divisor | 15 | |
| cryptohacker_101 | Modular Arithmetic 1 | 20 | |
| pseudonymous_ | Modes of Operation Starter | 15 | |
| phongpt55 | Structure of AES | 15 | |
| cryptohacker_101 | Extended GCD | 20 | |
| scenic | Curves and Logs | 40 | |
| 0xMrB34rd | Passwords as Keys | 50 | |
| TMKAK47 | You either know, XOR you don't | 30 | |
| drace94 | Background Reading | 5 | |
| scenic | Scalar Multiplication | 35 | |
| JohnLemon7 | ECB CBC WTF | 55 | |
| aresinheaven | Missing Modulus | 80 | |
| drace94 | Export-grade | 100 | |
| scenic | Point Addition | 30 | |
| scenic | Point Negation | 10 | |
| scenic | Background Reading | 5 | |
| layth_j | Encoding Challenge | 40 | |
| Amit1111111111 | Extended GCD | 20 | |
| 0xMrB34rd | Modes of Operation Starter | 15 | |
| 0xMrB34rd | Bringing It All Together | 50 | |
| elesquina | ECB Oracle | 60 | |
| drace94 | Parameter Injection | 60 | |
| aresinheaven | Nativity | 60 | |
| applejuice | You either know, XOR you don't | 30 | |
| aresinheaven | Bounded Noise | 50 | |
| Goody | Extended GCD | 20 | |
| drace94 | Deriving Symmetric Keys | 40 | |
| mutant_ninja | Modes of Operation Starter | 15 | |
| applejuice | Favourite byte | 20 | |
| serge133 | Greatest Common Divisor | 15 | |
| chrispapaoic | You either know, XOR you don't | 30 | |
| bonpepe | Legendre Symbol | 35 | |
| mppl2404 | Greatest Common Divisor | 15 | |
| applejuice | XOR Properties | 15 | |
| DSR | Scalar Multiplication | 35 | |
| drace94 | Computing Shared Secrets | 30 | |
| drace94 | Computing Public Values | 25 | |
| DSR | Point Addition | 30 | |
| Pradyumna | Resisting Bruteforce | 10 | |
| aresinheaven | Noise Free | 40 | |
| just_chill_abha | Round Keys | 20 | |
| 0xMrB34rd | Diffusion through Permutation | 30 | |
| Pradyumna | Keyed Permutations | 5 | |
| 0xMrB34rd | Confusion through Substitution | 25 | |
| kushnerykpavlo | Resisting Bruteforce | 10 | |
| duffduff | ASCII | 5 | |
| kushnerykpavlo | Keyed Permutations | 5 | |
| temidojo | Favourite byte | 20 |
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