| Date | User | Challenge | Score |
| sudor269 | Modulus Inutilis | 50 | |
| BenMosh1 | Resisting Bruteforce | 10 | |
| BenMosh1 | Keyed Permutations | 5 | |
| arealsquirrel | Square Eyes | 35 | |
| ali125 | Modular Inverting | 25 | |
| sudor269 | Salty | 20 | |
| eirene | Encoding Challenge | 40 | |
| ali125 | Modular Arithmetic 2 | 20 | |
| Barak | Hash Stuffing | 50 | |
| K11 | LWE Intro | 10 | |
| Kheeto | Great Snakes | 3 | |
| Kheeto | Finding Flags | 2 | |
| eirene | Lemur XOR | 40 | |
| dansayag | Hash Stuffing | 50 | |
| ali125 | Modular Arithmetic 1 | 20 | |
| whale120 | Real Eisenstein | 150 | |
| kzzm | Triple DES | 60 | |
| K11 | Backpack Cryptography | 120 | |
| Googo | Successive Powers | 60 | |
| hayzer | Resisting Bruteforce | 10 | |
| NoamFridman | Hash Stuffing | 50 | |
| g17 | Network Attacks | 5 | |
| gitalboaron | Hash Stuffing | 50 | |
| Minsunie79 | ASCII | 5 | |
| Ch1ko1 | Legendre Symbol | 35 | |
| ameen | Hash Stuffing | 50 | |
| itayst1 | Hash Stuffing | 50 | |
| Yousef_mo7sen | ASCII | 5 | |
| Redender64 | Montgomery Curves | 30 | |
| hayzer | Keyed Permutations | 5 | |
| perlica | Passwords as Keys | 50 | |
| crypto_123123 | Hash Stuffing | 50 | |
| whale120 | Let's Decrypt Again | 175 | |
| yoav_s | Script Kiddie | 70 | |
| Gabsadio | Efficient Exchange | 50 | |
| arealsquirrel | Modes of Operation Starter | 15 | |
| ali125 | Extended GCD | 20 | |
| GHL | Bytes and Big Integers | 10 | |
| tanayK | Confusion through Substitution | 25 | |
| Galois | Salty | 20 | |
| arealsquirrel | CERTainly not | 30 | |
| perlica | Modes of Operation Starter | 15 | |
| Galois | Manyprime | 40 | |
| arealsquirrel | Privacy-Enhanced Mail? | 25 | |
| rama2130 | Null or Never | 100 | |
| Galois | Square Eyes | 35 | |
| Galois | Monoprime | 30 | |
| fr1x3r | Chinese Remainder Theorem | 40 | |
| Minsunie79 | Great Snakes | 3 | |
| sasi027 | Hash Stuffing | 50 |
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