Impersonation
Noun · Security & Infosec
Definitions
The act of pretending to be another user, service, or trusted entity in order to gain access, trust, or influence. Impersonation can occur through stolen credentials, forged tokens, spoofed communications, or abused delegation features.
In plain English: Pretending to be someone else to gain trust or access.
Example: "The attackers used OAuth token theft for impersonation instead of resetting the victim's password."