| Date | User | Challenge | Score |
| Wuming0423 | Modular Exponentiation | 10 | |
| emsa | Secure Protocols | 5 | |
| DannyWales | Adrien's Signs | 80 | |
| capnolove | Diffusion through Permutation | 30 | |
| jackoha | Megalomaniac 1 | 100 | |
| notfell | Favourite byte | 20 | |
| Staroll | RSA Signatures | 25 | |
| User0069 | Special Soundness | 25 | |
| Tagadasme3000 | Bruce Schneier's Password: Part 2 | 250 | |
| pin | No Way Back Home | 100 | |
| Smuggler | Modular Square Root | 35 | |
| jackoha | The Matrix Revolutions | 125 | |
| nevarin | Great Snakes | 3 | |
| Regnm0ln1 | Montgomery's Ladder | 40 | |
| nevarin | Finding Flags | 2 | |
| fisherman | Great Snakes | 3 | |
| ITQ | RSA Signatures | 25 | |
| DannyWales | Chinese Remainder Theorem | 40 | |
| ddanggui | Modular Binomials | 80 | |
| fisherman | Finding Flags | 2 | |
| YGUY | Jack's Birthday Hash | 20 | |
| jackoha | The Matrix Reloaded | 100 | |
| Asterix22 | Greatest Common Divisor | 15 | |
| KongBai | Network Attacks | 5 | |
| alt255 | Infinite Descent | 50 | |
| LacMyst | Greatest Common Divisor | 15 | |
| capnolove | Confusion through Substitution | 25 | |
| emsa | JSON in JSON | 40 | |
| Huyyeuthu2104 | Jack's Birthday Hash | 20 | |
| ddanggui | Adrien's Signs | 80 | |
| Smuggler | Legendre Symbol | 35 | |
| ITQ | RSA Decryption | 20 | |
| ITQ | Private Keys | 20 | |
| y0dam4n | Export-grade | 100 | |
| DannyWales | Modular Square Root | 35 | |
| ITQ | Euler's Totient | 20 | |
| ITQ | Public Keys | 15 | |
| KongBai | Generators of Groups | 20 | |
| ITQ | Modular Exponentiation | 10 | |
| That11thHarmonic | André Encoding | 80 | |
| ahmad_mudzakkir | Hex | 5 | |
| KongBai | Working with Fields | 10 | |
| emsa | RSA or HMAC? | 35 | |
| KongBai | Modulus Inutilis | 50 | |
| pacillians | Legendre Symbol | 35 | |
| ghaisan | Generators of Groups | 20 | |
| KongBai | Salty | 20 | |
| Asterix22 | You either know, XOR you don't | 30 | |
| TechnoVolt | Bytes and Big Integers | 10 | |
| Rockytire | XOR Starter | 10 |
You are now level Current level