| Date | User | Challenge | Score |
| KIEMA91 | Modular Inverting | 25 | |
| lucy54 | Endless Emails | 150 | |
| tralexa | Lemur XOR | 40 | |
| Uranophilus | XOR Starter | 10 | |
| galpoli | Keyed Permutations | 5 | |
| semisweetdude | ECB Oracle | 60 | |
| tralexa | Encoding Challenge | 40 | |
| CodeKnight77 | Bytes and Big Integers | 10 | |
| Marchet_91 | Adrien's Signs | 80 | |
| Fath | ASCII | 5 | |
| bschweitz | XOR Properties | 15 | |
| KIEMA91 | Modular Arithmetic 2 | 20 | |
| tralexa | Transparency | 50 | |
| Apsolem | Hex | 5 | |
| CodeKnight77 | Base64 | 10 | |
| rapt00r | Hash Stuffing | 50 | |
| tralexa | SSH Keys | 35 | |
| tralexa | CERTainly not | 30 | |
| Marchet_91 | Chinese Remainder Theorem | 40 | |
| NMH_Asin | RSA or HMAC? Part 2 | 100 | |
| sixsquareAI | Scalar Multiplication | 35 | |
| tralexa | Privacy-Enhanced Mail? | 25 | |
| lann | You either know, XOR you don't | 30 | |
| CodeKnight77 | Hex | 5 | |
| whoiswhois | Double and Broken | 50 | |
| sixsquareAI | Efficient Exchange | 50 | |
| g0ld3 | Extended GCD | 20 | |
| Nikaru | Hex | 5 | |
| KIEMA91 | Modular Arithmetic 1 | 20 | |
| Nikaru | ASCII | 5 | |
| maksushka | Export-grade | 100 | |
| CodeKnight77 | ASCII | 5 | |
| Nikaru | Great Snakes | 3 | |
| CodeKnight77 | Great Snakes | 3 | |
| NMH_Asin | Megalomaniac 3 | 120 | |
| Nikaru | Finding Flags | 2 | |
| Mohammad28 | Greatest Common Divisor | 15 | |
| Arj_Goon09 | You either know, XOR you don't | 30 | |
| KIEMA91 | Extended GCD | 20 | |
| tralexa | Modular Inverting | 25 | |
| NMH_Asin | Megalomaniac 1 | 100 | |
| NMH_Asin | Megalomaniac 2 | 120 | |
| CodeKnight77 | Finding Flags | 2 | |
| tralexa | Modular Arithmetic 2 | 20 | |
| sixsquareAI | Crossed Wires | 100 | |
| tralexa | Modular Arithmetic 1 | 20 | |
| RuslanPaputsia | Cofactor Cofantasy | 150 | |
| tralexa | Extended GCD | 20 | |
| mfnizam | Finding Flags | 2 | |
| no4h | Passwords as Keys | 50 |
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