May 2005
Intermediate to advanced
1176 pages
28h 24m
English
Imagine you've come to my house for a visit. We've met and talked before, worked on a project together, or perhaps we know each other from church or because our boys attend the same high school. At the door, I greet you and invite you inside. What is it that keeps you from immediately going wherever you want? What prevents you from grabbing a beer from my refrigerator, knocking over the china cabinet, and kicking my dog?
Surely you're grinning now; you've recognized my ploy—you've equated my recognition of you as authentication and the use of biometrics (I recognize you by your appearance). And you've recognized my inviting you inside as authorization to enter the house, ...
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