| Date | User | Challenge | Score |
| 25521051 | ECB Oracle | 60 | |
| aabbcc | RSA Signatures | 25 | |
| aabbcc | RSA Decryption | 20 | |
| aabbcc | Private Keys | 20 | |
| aabbcc | Euler's Totient | 20 | |
| aabbcc | Public Keys | 15 | |
| Sualdensala_12 | Extended GCD | 20 | |
| Sualdensala_12 | Greatest Common Divisor | 15 | |
| nez3r0 | Encoding Challenge | 40 | |
| aabbcc | Modular Exponentiation | 10 | |
| shadowroot | Base64 | 10 | |
| User0069 | Common Ground | 75 | |
| shadowroot | Hex | 5 | |
| Jacuzzi | XOR Starter | 10 | |
| shadowroot | ASCII | 5 | |
| shadowroot | Great Snakes | 3 | |
| ndr | Long Story Short | 60 | |
| ndr | Seventy-Two | 50 | |
| Arek | You either know, XOR you don't | 30 | |
| F4lk3 | Hex | 5 | |
| Arek | Favourite byte | 20 | |
| F4lk3 | ASCII | 5 | |
| F4lk3 | Great Snakes | 3 | |
| Arek | XOR Properties | 15 | |
| F4lk3 | Finding Flags | 2 | |
| Arek | XOR Starter | 10 | |
| Jacuzzi | Bytes and Big Integers | 10 | |
| Craigensk0013 | Finding Flags | 2 | |
| Sualdensala_12 | Lemur XOR | 40 | |
| NoBirdWasHam | Export-grade | 100 | |
| ndr | Common Ground | 75 | |
| nez3r0 | Network Attacks | 5 | |
| NoBirdWasHam | Parameter Injection | 60 | |
| Arek | Bytes and Big Integers | 10 | |
| RubyW | XOR Starter | 10 | |
| Arek | Base64 | 10 | |
| nez3r0 | You either know, XOR you don't | 30 | |
| nez3r0 | Favourite byte | 20 | |
| IJK | Finding Flags | 2 | |
| Jax_Schmidtlein | Hex | 5 | |
| jinx007 | Encoding Challenge | 40 | |
| Jax_Schmidtlein | Base64 | 10 | |
| Arek | Hex | 5 | |
| juju000 | Bytes and Big Integers | 10 | |
| rsa24 | Bytes and Big Integers | 10 | |
| noncense | Bytes and Big Integers | 10 | |
| Majidtsh | Great Snakes | 3 | |
| NoBirdWasHam | Deriving Symmetric Keys | 40 | |
| NoBirdWasHam | Computing Shared Secrets | 30 | |
| NoBirdWasHam | Computing Public Values | 25 |
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