| Date | User | Challenge | Score |
| laysinkhoo | XOR Properties | 15 | |
| Schpuntik | Base64 | 10 | |
| new_jakerhee123 | Nothing Up My Sleeve | 150 | |
| rafabarbeta | Paper Plane | 120 | |
| Dr1o02 | LWE Background | 5 | |
| Dr1o02 | Introduction to Isogenies | 10 | |
| BOCO0X | Base64 | 10 | |
| LocoSmoco | Finding Flags | 2 | |
| pastimeplays | Unencryptable | 125 | |
| Dr1o02 | Efficient Exchange | 50 | |
| laysinkhoo | XOR Starter | 10 | |
| BOCO0X | Hex | 5 | |
| Schpuntik | Hex | 5 | |
| BOCO0X | ASCII | 5 | |
| Schpuntik | ASCII | 5 | |
| mduffy2 | Symmetry | 50 | |
| Schpuntik | Great Snakes | 3 | |
| Schpuntik | Finding Flags | 2 | |
| valh4x | Trust Games | 150 | |
| mduffy2 | Flipping Cookie | 60 | |
| 3xpl01t | Everything is Still Big | 100 | |
| laysinkhoo | Bytes and Big Integers | 10 | |
| 3xpl01t | Endless Emails | 150 | |
| laysinkhoo | Base64 | 10 | |
| 3xpl01t | Everything is Big | 70 | |
| dlesk | Noise Free | 40 | |
| valh4x | Bruce Schneier's Password | 100 | |
| valh4x | Toshi's Treasure | 150 | |
| valh4x | Armory | 100 | |
| valh4x | Bit by Bit | 100 | |
| valh4x | Jeff's LFSR | 150 | |
| valh4x | L-Win | 120 | |
| valh4x | RSA vs RNG | 150 | |
| valh4x | Nothing Up My Sleeve | 150 | |
| NeoLullaby | ASCII | 5 | |
| NeoLullaby | Great Snakes | 3 | |
| cherisse | Great Snakes | 3 | |
| 3xpl01t | Lazy CBC | 60 | |
| laysinkhoo | Hex | 5 | |
| vtdnguyen | Let's Decrypt Again | 175 | |
| vtdnguyen | Vote for Pedro | 150 | |
| laysinkhoo | ASCII | 5 | |
| NeoLullaby | Finding Flags | 2 | |
| 3xpl01t | Transparency | 50 | |
| laysinkhoo | Network Attacks | 5 | |
| haiperAlexander | JSON in JSON | 40 | |
| NamNek | Modular Square Root | 35 | |
| vtdnguyen | Let's Decrypt | 80 | |
| vtdnguyen | Signing Server | 60 | |
| vtdnguyen | Null or Never | 100 |
You are now level Current level