| Date | User | Challenge | Score |
| l1l_w31rd03 | Confusion through Substitution | 25 | |
| l1l_w31rd03 | Round Keys | 20 | |
| AllanPoe | Bytes and Big Integers | 10 | |
| l1l_w31rd03 | Structure of AES | 15 | |
| l1l_w31rd03 | Resisting Bruteforce | 10 | |
| l1l_w31rd03 | Keyed Permutations | 5 | |
| Seventt | Resisting Bruteforce | 10 | |
| l1l_w31rd03 | SSH Keys | 35 | |
| l1l_w31rd03 | Transparency | 50 | |
| 01169322 | Dancing Queen | 120 | |
| l1l_w31rd03 | CERTainly not | 30 | |
| ymoe3 | ASCII | 5 | |
| l1l_w31rd03 | Privacy-Enhanced Mail? | 25 | |
| l1l_w31rd03 | Modular Inverting | 25 | |
| l1l_w31rd03 | Modular Arithmetic 2 | 20 | |
| burdock | No Difference | 175 | |
| l1l_w31rd03 | Modular Arithmetic 1 | 20 | |
| l1l_w31rd03 | Extended GCD | 20 | |
| l1l_w31rd03 | Lemur XOR | 40 | |
| Swivan | XOR Starter | 10 | |
| l1l_w31rd03 | Encoding Challenge | 40 | |
| jarinios | Sharks on the Wire | 10 | |
| Kaldah | Generators of Groups | 20 | |
| Krako | Saying Hello | 20 | |
| ymoe3 | Great Snakes | 3 | |
| ymoe3 | Finding Flags | 2 | |
| Seventt | Keyed Permutations | 5 | |
| burdock | Twin Keys | 100 | |
| User0069 | Additive | 70 | |
| Sphynx | Bytes and Big Integers | 10 | |
| rightnite | Flipping Cookie | 60 | |
| temmavn | Unimplemented (TETCTF) | 0 | |
| Baeco | An Exceptional Twisted Mind | 125 | |
| Parag | Chinese Remainder Theorem | 40 | |
| temmavn | Calm Down (HKCERT CTF) | 0 | |
| moonkissed | Favourite byte | 20 | |
| burdock | PriMeD5 | 100 | |
| Krako | TLS Handshake | 15 | |
| Parag | Modular Square Root | 35 | |
| yuit960 | Deriving Symmetric Keys | 40 | |
| Antares | Deriving Symmetric Keys | 40 | |
| kmarty | Deriving Symmetric Keys | 40 | |
| lil_billy | Modular Binomials | 80 | |
| gawol332 | Size and Basis | 15 | |
| rightnite | ECB CBC WTF | 55 | |
| ConorKTUD | Legendre Symbol | 35 | |
| User0069 | Static Client | 100 | |
| burdock | Hash Stuffing | 50 | |
| yuit960 | Computing Shared Secrets | 30 | |
| Yord2 | XOR Properties | 15 |
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