| Date | User | Challenge | Score |
| marti012 | ASCII | 5 | |
| flooeg | Chinese Remainder Theorem | 40 | |
| Bennettzy | XOR Properties | 15 | |
| marti012 | Great Snakes | 3 | |
| AltFreq | The Good, The Pad, The Ugly | 100 | |
| marti012 | Finding Flags | 2 | |
| AltFreq | The Matrix | 75 | |
| AltFreq | Let's Decrypt Again | 175 | |
| AltFreq | Triple DES | 60 | |
| AltFreq | Trust Games | 150 | |
| NicoNieners | Working with Fields | 10 | |
| AltFreq | Static Client 2 | 120 | |
| AltFreq | Let's Decrypt | 80 | |
| AltFreq | Bespoke Padding | 100 | |
| AltFreq | Lazy CBC | 60 | |
| AltFreq | Ron was Wrong, Whit is Right | 90 | |
| AltFreq | No Leaks | 100 | |
| AltFreq | WOTS Up 2 | 90 | |
| AltFreq | WOTS Up | 75 | |
| AltFreq | Mixed Up | 120 | |
| AltFreq | Infinite Descent | 50 | |
| AltFreq | Vote for Pedro | 150 | |
| AltFreq | Blinding Light | 120 | |
| AltFreq | Signing Server | 60 | |
| ipaa | Modular Arithmetic 2 | 20 | |
| AltFreq | Static Client | 100 | |
| AltFreq | Pad Thai | 80 | |
| AltFreq | Additive | 70 | |
| AltFreq | Authenticated Handshake | 40 | |
| AltFreq | Null or Never | 100 | |
| AltFreq | Endless Emails | 150 | |
| AltFreq | Crossed Wires | 100 | |
| AltFreq | Logon Zero | 80 | |
| ipaa | Modular Arithmetic 1 | 20 | |
| AltFreq | Double and Broken | 50 | |
| AltFreq | Prime and Prejudice | 200 | |
| AltFreq | Jeff's LFSR | 150 | |
| VRO | ASCII | 5 | |
| AltFreq | Decrypting TLS 1.2 | 30 | |
| AltFreq | Everything is Big | 70 | |
| AltFreq | Marin's Secrets | 50 | |
| AltFreq | Micro Transmissions | 120 | |
| AltFreq | Decrypting TLS 1.3 | 35 | |
| AltFreq | Bruce Schneier's Password | 100 | |
| AltFreq | Square Eyes | 35 | |
| AltFreq | Inferius Prime | 30 | |
| AltFreq | No Difference | 175 | |
| AltFreq | Saying Hello | 20 | |
| AltFreq | Secure Protocols | 5 | |
| AltFreq | TLS Handshake | 15 |
You are now level Current level