The Protection Triad
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
A protection mechanism has three aspects: authentication identifies the party behind each action, authorization determines which parties may do what, and access enforcement applies both — one flaw compromises the whole.
Show
A records room checks who arrives, what they may pull, then holds the door.
Watch for
Three strong parts with one gap equal zero.