I am solving some CTF lab. I send a request and get response in which it contains cookie. Cookie has three element. First is token and something that is ecdsa signed. The second is domain name. The third is path. The question I want to know is if I get public key from domain name or something like that.
Update
I want to use public key for ECDSA signature. The source code is saying that private key is generated using secure random library.