Security & Privacy
Authentication
AuthN
Verifying that a user, service, or agent is who it claims to be.
Example
A user signs in with a password and security key to prove their identity.
Why it matters
It helps prevent someone from acting under another person's or system's identity.
You'll hear it
“The service needs to confirm which account is making this request.”
Can you control it?
Sometimes
Sometimes. Some products or workflows let you influence authentication, while others keep it fixed or manage it automatically. Check the settings and documentation for the tool you are using.
Common questions
- Does successful authentication allow every action?
- No. The account may still lack permission for a particular operation.
- Can an authenticated account still be compromised?
- Yes. A stolen credential can allow someone else to appear legitimate.
- Does authentication always mean entering a password?
- No. Systems can use other methods, such as a security key or approved sign-in service.