| Date | User | Challenge | Score |
| veiko | Legendre Symbol | 35 | |
| gabriellino1936 | Greatest Common Divisor | 15 | |
| zsoli | Quadratic Residues | 25 | |
| magda_almpani | Modes of Operation Starter | 15 | |
| gabriellino1936 | You either know, XOR you don't | 30 | |
| nicw33 | XOR Starter | 10 | |
| nicw33 | Bytes and Big Integers | 10 | |
| calebdotee | Hex | 5 | |
| gabriellino1936 | Favourite byte | 20 | |
| calebdotee | ASCII | 5 | |
| calebdotee | Great Snakes | 3 | |
| gabriellino1936 | XOR Properties | 15 | |
| gprendi | Quadratic Residues | 25 | |
| sara999999 | RSA Decryption | 20 | |
| calebdotee | Finding Flags | 2 | |
| nicw33 | Base64 | 10 | |
| lerequin | Computing Public Values | 25 | |
| nicw33 | Hex | 5 | |
| sara999999 | Euler's Totient | 20 | |
| nicw33 | ASCII | 5 | |
| sara999999 | Modular Exponentiation | 10 | |
| sara999999 | Base64 | 10 | |
| gabriellino1936 | XOR Starter | 10 | |
| zsoli | Modular Inverting | 25 | |
| magda_almpani | Bringing It All Together | 50 | |
| sara999999 | Hex | 5 | |
| sara999999 | ASCII | 5 | |
| sara999999 | Great Snakes | 3 | |
| kanellam | Secure Protocols | 5 | |
| kanellam | JSON in JSON | 40 | |
| sara999999 | Finding Flags | 2 | |
| scheme | Triple DES | 60 | |
| nicw33 | Great Snakes | 3 | |
| gabriellino1936 | Bytes and Big Integers | 10 | |
| 0xShadow1337 | Quadratic Residues | 25 | |
| desiar76 | Quadratic Residues | 25 | |
| gabriellino1936 | Base64 | 10 | |
| gabriellino1936 | Hex | 5 | |
| smortMan | XOR Starter | 10 | |
| nicw33 | Finding Flags | 2 | |
| gabriellino1936 | ASCII | 5 | |
| M0xX | SSH Keys | 35 | |
| kanellam | RSA or HMAC? | 35 | |
| gabriellino1936 | Great Snakes | 3 | |
| gabriellino1936 | Finding Flags | 2 | |
| sdigs | Transparency | 50 | |
| smortMan | Bytes and Big Integers | 10 | |
| Sharan07 | Bringing It All Together | 50 | |
| rebecapassoss | Finding Flags | 2 | |
| ayumu_kasuga | Proofs of Knowledge | 20 |
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