zhangdh
2nd place
43 points
Awards
Solves
| Challenge | Category | Value | Time |
| Step 3 to verify the signature | Cryptography | 20 | |
| Find the public key | Cryptography | 0 | |
| Find the signature | Cryptography | 20 | |
| Recover Alice's password | Cryptography | 1 | |
| Useful transformation | Cryptography | 1 | |
| It is quite easy | Cryptography | 1 |