| Date | User | Challenge | Score |
| kenkuts | Favourite byte | 20 | |
| Patr1ckf | CERTainly not | 30 | |
| Amezquita | Resisting Bruteforce | 10 | |
| Patr1ckf | Privacy-Enhanced Mail? | 25 | |
| lowprofillehack | Finding Flags | 2 | |
| josecedeno | Great Snakes | 3 | |
| VuiVe | Decrypting TLS 1.2 | 30 | |
| Amezquita | Keyed Permutations | 5 | |
| xavionun | Resisting Bruteforce | 10 | |
| Havi | Round Keys | 20 | |
| xavionun | Keyed Permutations | 5 | |
| SodaCodesMMD | ECB CBC WTF | 55 | |
| pibble | Hex | 5 | |
| pibble | ASCII | 5 | |
| josecedeno | Finding Flags | 2 | |
| kenkuts | XOR Properties | 15 | |
| pibble | Great Snakes | 3 | |
| nims | ASCII | 5 | |
| Zernullo | Finding Flags | 2 | |
| grupocryptohack | RSA Signatures | 25 | |
| nims | Great Snakes | 3 | |
| Krisna | MD0 | 80 | |
| nims | Finding Flags | 2 | |
| grupocryptohack | Modulus Inutilis | 50 | |
| grupocryptohack | Salty | 20 | |
| dlesk | Let's Prove It | 120 | |
| grupocryptohack | Manyprime | 40 | |
| grupocryptohack | Square Eyes | 35 | |
| grupocryptohack | Monoprime | 30 | |
| ktaveras9 | ASCII | 5 | |
| grupocryptohack | Inferius Prime | 30 | |
| grupocryptohack | Factoring | 15 | |
| leo_cyber | XOR Starter | 10 | |
| grupocryptohack | RSA Decryption | 20 | |
| grupocryptohack | Private Keys | 20 | |
| swetygodd | MD0 | 80 | |
| Patr1ckf | Extended GCD | 20 | |
| leo_cyber | Bytes and Big Integers | 10 | |
| kenkuts | XOR Starter | 10 | |
| leo_cyber | Base64 | 10 | |
| Zolvifox | Base64 | 10 | |
| leo_cyber | Hex | 5 | |
| Zolvifox | Hex | 5 | |
| n8betha | Pad Thai | 80 | |
| leo_cyber | ASCII | 5 | |
| mesterm120 | You either know, XOR you don't | 30 | |
| Zolvifox | ASCII | 5 | |
| leo_cyber | Great Snakes | 3 | |
| barrapuda | No Way Back Home | 100 | |
| richardkasdorf | Modular Arithmetic 1 | 20 |
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