| Date | User | Challenge | Score |
| psvm10v | Modular Arithmetic 2 | 20 | |
| chinmoy_paul | Ticket Maestro | 200 | |
| yehuda2233 | Quadratic Residues | 25 | |
| lvcv4y | CTRIME | 70 | |
| aslarin | Favourite byte | 20 | |
| manvin_chager | You either know, XOR you don't | 30 | |
| manvin_chager | Favourite byte | 20 | |
| Jika | ASCII | 5 | |
| manvin_chager | XOR Properties | 15 | |
| aslarin | XOR Properties | 15 | |
| paxel | Favourite byte | 20 | |
| Hikari_sama | Favourite byte | 20 | |
| sgrenz | OR Proof (CryptoHack) | 0 | |
| mrunmai | RSA Decryption | 20 | |
| sgrenz | OR Proof | 75 | |
| AntonioVictor | Favourite byte | 20 | |
| anas_cool | Finding Flags | 2 | |
| Nutbag | Hex | 5 | |
| nehuborrajo | Passwords as Keys | 50 | |
| rodri | Manyprime | 40 | |
| Caliya | Greatest Common Divisor | 15 | |
| GrimScythe2001 | Ron was Wrong, Whit is Right | 90 | |
| nehuborrajo | Modes of Operation Starter | 15 | |
| joseph21 | Bytes and Big Integers | 10 | |
| joseph21 | Base64 | 10 | |
| Nutbag | ASCII | 5 | |
| Dhafa_Marcelio | Generators of Groups | 20 | |
| joseph21 | Hex | 5 | |
| joseph21 | ASCII | 5 | |
| joseph21 | Great Snakes | 3 | |
| Occultist4484 | XOR Properties | 15 | |
| sa6kolu4 | Great Snakes | 3 | |
| nehuborrajo | Bringing It All Together | 50 | |
| joseph21 | Finding Flags | 2 | |
| Dhafa_Marcelio | Working with Fields | 10 | |
| sa6kolu4 | Finding Flags | 2 | |
| nehuborrajo | Diffusion through Permutation | 30 | |
| ZenXD_123 | ASCII | 5 | |
| ZenXD_123 | Great Snakes | 3 | |
| Dhafa_Marcelio | Modulus Inutilis | 50 | |
| Nutbag | Great Snakes | 3 | |
| ZenXD_123 | Finding Flags | 2 | |
| Dhafa_Marcelio | Salty | 20 | |
| Nutbag | Finding Flags | 2 | |
| nehuborrajo | Confusion through Substitution | 25 | |
| Mackelit0 | Base64 | 10 | |
| rodri | Modulus Inutilis | 50 | |
| nehuborrajo | Round Keys | 20 | |
| artem_1 | Keyed Permutations | 5 | |
| minggermany | Finding Flags | 2 |
You are now level Current level