| Date | User | Challenge | Score |
| LeeWangWy | Structure of AES | 15 | |
| MidoS3d | Point Negation | 10 | |
| LobelJ | Finding Flags | 2 | |
| chchh | Finding Flags | 2 | |
| papajek | XOR Starter | 10 | |
| sakura0503 | Great Snakes | 3 | |
| Theodo | DLOG on the Surface | 40 | |
| sakura0503 | Finding Flags | 2 | |
| hackerpj12 | Passwords as Keys | 50 | |
| nurminen | Pairing-Based Cryptography | 50 | |
| starking | Resisting Bruteforce | 10 | |
| d4pr0 | Saying Hello | 20 | |
| username113 | Hex | 5 | |
| starking | Keyed Permutations | 5 | |
| username113 | ASCII | 5 | |
| johnpork | XOR Starter | 10 | |
| username113 | Great Snakes | 3 | |
| username113 | Finding Flags | 2 | |
| hackerpj12 | Modes of Operation Starter | 15 | |
| d4pr0 | TLS Handshake | 15 | |
| User0069 | Crossed Wires | 100 | |
| Bitcoin | XOR Properties | 15 | |
| goodnightch | ASCII | 5 | |
| ayoub04 | Successive Powers | 60 | |
| hackerpj12 | Bringing It All Together | 50 | |
| goodnightch | Great Snakes | 3 | |
| goodnightch | Finding Flags | 2 | |
| baghdadi | Modular Arithmetic 1 | 20 | |
| baghdadi | Extended GCD | 20 | |
| ayoub04 | Modular Binomials | 80 | |
| baghdadi | Greatest Common Divisor | 15 | |
| baghdadi | You either know, XOR you don't | 30 | |
| baghdadi | Favourite byte | 20 | |
| baghdadi | XOR Properties | 15 | |
| kinokith1 | You either know, XOR you don't | 30 | |
| baghdadi | XOR Starter | 10 | |
| baghdadi | Bytes and Big Integers | 10 | |
| johnpork | Bytes and Big Integers | 10 | |
| kinokith1 | Favourite byte | 20 | |
| c0rruptedH3xx | Base64 | 10 | |
| kinokith1 | XOR Properties | 15 | |
| d4pr0 | Sharks on the Wire | 10 | |
| Bitcoin | XOR Starter | 10 | |
| kazak4078 | Resisting Bruteforce | 10 | |
| johnpork | Base64 | 10 | |
| kazak4078 | Keyed Permutations | 5 | |
| bhanuPathak | Working with Fields | 10 | |
| kazak4078 | Modular Binomials | 80 | |
| bektish | Passwords as Keys | 50 | |
| Bud90 | Great Snakes | 3 |
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