| Date | User | Challenge | Score |
| gmenichetti | Privacy-Enhanced Mail? | 25 | |
| m7med_alshahri | Modes of Operation Starter | 15 | |
| Wisdom_doom | Diffusion through Permutation | 30 | |
| konchan | Extended GCD | 20 | |
| mateAplicada | XOR Properties | 15 | |
| jiojio | Base64 | 10 | |
| nehuborrajo | Lemur XOR | 40 | |
| nehuborrajo | You either know, XOR you don't | 30 | |
| mateAplicada | XOR Starter | 10 | |
| mateAplicada | Encoding Challenge | 40 | |
| nehuborrajo | Favourite byte | 20 | |
| gmenichetti | CERTainly not | 30 | |
| mateAplicada | Bytes and Big Integers | 10 | |
| tiger844 | Base64 | 10 | |
| m7med_alshahri | Jack's Birthday Hash | 20 | |
| gmenichetti | Modular Arithmetic 1 | 20 | |
| nehuborrajo | XOR Properties | 15 | |
| jiojio | Hex | 5 | |
| 25521051 | Transparency | 50 | |
| nehuborrajo | XOR Starter | 10 | |
| mateAplicada | Base64 | 10 | |
| mateAplicada | Hex | 5 | |
| nehuborrajo | Bytes and Big Integers | 10 | |
| tiger844 | Hex | 5 | |
| gmenichetti | Modular Inverting | 25 | |
| Celer | XOR Properties | 15 | |
| Grupo10MA | You either know, XOR you don't | 30 | |
| gmenichetti | Extended GCD | 20 | |
| gmenichetti | Base64 | 10 | |
| gmenichetti | You either know, XOR you don't | 30 | |
| nehuborrajo | Base64 | 10 | |
| nehuborrajo | Encoding Challenge | 40 | |
| gmenichetti | XOR Properties | 15 | |
| nehuborrajo | Network Attacks | 5 | |
| gmenichetti | Encoding Challenge | 40 | |
| KryptoUser | Transparency | 50 | |
| nashat | ASCII | 5 | |
| jiojio | ASCII | 5 | |
| Grupo10MA | Network Attacks | 5 | |
| Grupo10MA | Great Snakes | 3 | |
| Grupo10MA | Finding Flags | 2 | |
| lylythechosenone | Modular Arithmetic 1 | 20 | |
| jiojio | Great Snakes | 3 | |
| KryptoUser | Encoding Challenge | 40 | |
| georgie_888 | You either know, XOR you don't | 30 | |
| AsymCrypto | Hex | 5 | |
| mateAplicada | ASCII | 5 | |
| gmenichetti | ASCII | 5 | |
| m7med_alshahri | ASCII | 5 | |
| axel_fenske | Great Snakes | 3 |
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