| Date | User | Challenge | Score |
| PanagiotisK | Modular Binomials | 80 | |
| AndyVale | JSON in JSON | 40 | |
| Fangy | Modular Exponentiation | 10 | |
| Leftstam | Favourite byte | 20 | |
| Leftstam | XOR Properties | 15 | |
| panhrist | Working with Fields | 10 | |
| rush_i | Modular Arithmetic 2 | 20 | |
| panhrist | Modulus Inutilis | 50 | |
| Aparaititos | RSA Decryption | 20 | |
| OechxD | Modes of Operation Starter | 15 | |
| shivamsah | Generators of Groups | 20 | |
| Leftstam | XOR Starter | 10 | |
| littlehatboy | XOR Starter | 10 | |
| OechxD | Bringing It All Together | 50 | |
| rush_i | Modular Arithmetic 1 | 20 | |
| Leftstam | Public Keys | 15 | |
| PanagiotisK | Adrien's Signs | 80 | |
| Mppl2437 | XOR Properties | 15 | |
| moe0l | Marin's Secrets | 50 | |
| 0xg0k | Finding Flags | 2 | |
| porolishinan | Transparency | 50 | |
| Mppl2437 | XOR Starter | 10 | |
| Aparaititos | Private Keys | 20 | |
| sovin | XOR Starter | 10 | |
| rush_i | Extended GCD | 20 | |
| moe0l | Infinite Descent | 50 | |
| mars_y | Hex | 5 | |
| rs_sku | Hex | 5 | |
| littlehatboy | Bytes and Big Integers | 10 | |
| DiamondKiller | You either know, XOR you don't | 30 | |
| federico27 | You either know, XOR you don't | 30 | |
| Leftstam | RSA Backdoor Viability | 175 | |
| FullestSdg | Great Snakes | 3 | |
| bodymo20000 | Keyed Permutations | 5 | |
| mars_y | ASCII | 5 | |
| FullestSdg | Finding Flags | 2 | |
| diggio | Deriving Symmetric Keys | 40 | |
| littlehatboy | Base64 | 10 | |
| PanagiotisK | Chinese Remainder Theorem | 40 | |
| panhrist | Salty | 20 | |
| rs_sku | ASCII | 5 | |
| InsightRC | Greatest Common Divisor | 15 | |
| mars_y | Finding Flags | 2 | |
| PatrickL_SC | Oracular Spectacular | 150 | |
| FullestSdg | Lo-Hi Card Game | 120 | |
| littlehatboy | Hex | 5 | |
| rs_sku | Great Snakes | 3 | |
| panhrist | Manyprime | 40 | |
| rs_sku | Finding Flags | 2 | |
| Mppl2437 | Network Attacks | 5 |
You are now level Current level