[chrisweekly]

authN = autheNtication (identity / "who are you")

authZ = authoriZation (access / "what are you allowed to do")

[part1of2]

Also, in general

OAuth => think authZ

OIDC => think authN

[chrisweekly]

Yep.

And auth0 ("auth Zero, not letter o") is a company / service that offers both authN and authZ.