| Date | User | Challenge | Score |
| Jonirene | Modes of Operation Starter | 15 | |
| Dessert | Manyprime | 40 | |
| Jonirene | Bringing It All Together | 50 | |
| Rodel | RSA Decryption | 20 | |
| crtivo | Hex | 5 | |
| Rodel | Private Keys | 20 | |
| crtivo | ASCII | 5 | |
| Namunamu | Successive Powers | 60 | |
| Rodel | Euler's Totient | 20 | |
| ovcone | Diffusion through Permutation | 30 | |
| Rodel | Bean Counter | 60 | |
| Rodel | Symmetry | 50 | |
| crtivo | Great Snakes | 3 | |
| cant1nhoAlfr3do | Diffusion through Permutation | 30 | |
| mypalpal | Working with Fields | 10 | |
| cryptohack720 | Size and Basis | 15 | |
| runef | Greatest Common Divisor | 15 | |
| lnganhhuy | XOR Starter | 10 | |
| Rodel | Flipping Cookie | 60 | |
| ovcone | Confusion through Substitution | 25 | |
| cant1nhoAlfr3do | Confusion through Substitution | 25 | |
| ovcone | Round Keys | 20 | |
| Cold4 | You either know, XOR you don't | 30 | |
| T0m1606 | Flipping Cookie | 60 | |
| ovcone | Structure of AES | 15 | |
| ch4tbl4nc | Modular Binomials | 80 | |
| c0d4 | Modular Binomials | 80 | |
| cryptohack720 | Vectors | 10 | |
| ovcone | Resisting Bruteforce | 10 | |
| cant1nhoAlfr3do | Round Keys | 20 | |
| ovcone | Keyed Permutations | 5 | |
| ovcone | Modular Binomials | 80 | |
| lasagnezio | Extended GCD | 20 | |
| lnganhhuy | Bytes and Big Integers | 10 | |
| cant1nhoAlfr3do | Structure of AES | 15 | |
| devan | Decrypting TLS 1.3 | 35 | |
| suneo31415926535 | Everything is Still Big | 100 | |
| ghovhann | Symmetry | 50 | |
| cant1nhoAlfr3do | Resisting Bruteforce | 10 | |
| cant1nhoAlfr3do | Keyed Permutations | 5 | |
| UrLastWish | ECB CBC WTF | 55 | |
| lnganhhuy | Base64 | 10 | |
| OsloOnCyb | Hex | 5 | |
| ovcone | Adrien's Signs | 80 | |
| mypalpal | Modulus Inutilis | 50 | |
| lnganhhuy | Hex | 5 | |
| Tyk0 | Monoprime | 30 | |
| devan | Decrypting TLS 1.2 | 30 | |
| Joichirou | Hex | 5 | |
| mypalpal | Salty | 20 |
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