| Date | User | Challenge | Score |
| 5cOTT | You either know, XOR you don't | 30 | |
| paoariz | XOR Starter | 10 | |
| ThiThibz | Modular Arithmetic 2 | 20 | |
| ThiThibz | Modular Arithmetic 1 | 20 | |
| PancakeLlama | Working with Fields | 10 | |
| MizoX | Bytes and Big Integers | 10 | |
| innuend0 | XOR Starter | 10 | |
| suzume | Quadratic Residues | 25 | |
| Igt | Base64 | 10 | |
| AAlessandro | Find the Lattice | 100 | |
| koggy | CTRIME | 70 | |
| Wizadam141 | Network Attacks | 5 | |
| calvernaz | Passwords as Keys | 50 | |
| ThiThibz | Extended GCD | 20 | |
| calvernaz | Modes of Operation Starter | 15 | |
| innuend0 | Bytes and Big Integers | 10 | |
| 5cOTT | Favourite byte | 20 | |
| ThiThibz | Greatest Common Divisor | 15 | |
| Igt | Hex | 5 | |
| smurf1337 | Symmetry | 50 | |
| B00177179 | JWT Sessions | 10 | |
| suzume | Modular Inverting | 25 | |
| smurf1337 | Flipping Cookie | 60 | |
| B00177179 | Token Appreciation | 5 | |
| smurf1337 | ECB CBC WTF | 55 | |
| LostStateMachine | Ron was Wrong, Whit is Right | 90 | |
| smurf1337 | ECB Oracle | 60 | |
| suzume | Modular Arithmetic 2 | 20 | |
| calvernaz | Bringing It All Together | 50 | |
| B00177179 | Modes of Operation Starter | 15 | |
| aman_hecker | Bytes and Big Integers | 10 | |
| Igt | ASCII | 5 | |
| siancec | Symmetry | 50 | |
| Igt | Great Snakes | 3 | |
| rannime | Hex | 5 | |
| juzal | Manyprime | 40 | |
| sapphique_ | Network Attacks | 5 | |
| Wizadam141 | You either know, XOR you don't | 30 | |
| mehreena | Finding Flags | 2 | |
| Saschatouille | Beatboxer | 150 | |
| Blaze1 | XOR Starter | 10 | |
| suzume | Modular Arithmetic 1 | 20 | |
| B00177179 | RSA Decryption | 20 | |
| enesseven | ASCII | 5 | |
| lucknera | Ron was Wrong, Whit is Right | 90 | |
| smurf1337 | Passwords as Keys | 50 | |
| suzume | Extended GCD | 20 | |
| amenitlili | Favourite byte | 20 | |
| B00177179 | Private Keys | 20 | |
| mkrajevsky | Collider | 50 |
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