Final answer:
The goals of the adversary when forging a signature include authentication, gaining access, and denying authorization.
Step-by-step explanation:
The goals of the adversary when forging a signature are:
- To authenticate: An adversary may forge a signature to fake someone else's identity and gain unauthorized access to a system or document.
- To gain access: By forging a signature, an adversary can try to gain access to restricted areas or information.
- To deny authorization: An adversary may forge a signature to deny authorization to someone who has the rightful authority.
Therefore, the correct answer is All of the above (d).