| Date | User | Challenge | Score |
| hakka52 | Honest Verifier Zero Knowledge | 30 | |
| hakka52 | Special Soundness | 25 | |
| dasa | Hex | 5 | |
| dasa | ASCII | 5 | |
| dasa | Great Snakes | 3 | |
| dasa | Finding Flags | 2 | |
| Niang_Hamza | You either know, XOR you don't | 30 | |
| Kazee | Base64 | 10 | |
| Kazee | Hex | 5 | |
| Kazee | ASCII | 5 | |
| AP2451 | Finding Flags | 2 | |
| AironVzcr | Encoding Challenge | 40 | |
| Z4ME | You either know, XOR you don't | 30 | |
| Mai110moun | XOR Starter | 10 | |
| fucla | Passwords as Keys | 50 | |
| Mai110moun | Bytes and Big Integers | 10 | |
| Mai110moun | Base64 | 10 | |
| Mai110moun | Hex | 5 | |
| Mai110moun | ASCII | 5 | |
| Mai110moun | Great Snakes | 3 | |
| Z4ME | Favourite byte | 20 | |
| Mai110moun | Finding Flags | 2 | |
| Z10UD1 | Transparency | 50 | |
| Z10UD1 | SSH Keys | 35 | |
| Niang_Hamza | Favourite byte | 20 | |
| Z10UD1 | CERTainly not | 30 | |
| fucla | Modes of Operation Starter | 15 | |
| fucla | Bringing It All Together | 50 | |
| Z10UD1 | Privacy-Enhanced Mail? | 25 | |
| Niang_Hamza | XOR Properties | 15 | |
| AironVzcr | Bytes and Big Integers | 10 | |
| scriptboyi | Bringing It All Together | 50 | |
| b1b00www | Secure Protocols | 5 | |
| Z10UD1 | Modular Inverting | 25 | |
| Z10UD1 | Modular Arithmetic 2 | 20 | |
| Fafer | Transparency | 50 | |
| scriptboyi | Diffusion through Permutation | 30 | |
| Z10UD1 | Modular Arithmetic 1 | 20 | |
| WertherSamsa | Successive Powers | 60 | |
| scriptboyi | Confusion through Substitution | 25 | |
| scriptboyi | Round Keys | 20 | |
| scriptboyi | Structure of AES | 15 | |
| Z10UD1 | Extended GCD | 20 | |
| scriptboyi | Resisting Bruteforce | 10 | |
| Z10UD1 | Greatest Common Divisor | 15 | |
| scriptboyi | Keyed Permutations | 5 | |
| vdam | Collider | 50 | |
| b1b00www | RSA or HMAC? Part 2 | 100 | |
| Z10UD1 | Lemur XOR | 40 | |
| WertherSamsa | Chinese Remainder Theorem | 40 |
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