Has anyone ever actually used or seen a valet key?
That's the part of the classic ocap intro story that I think is a bit weird; I never heard of one, so I had to first learn what a valet key was, and *then* think about how it applies to delegation/attenuation in ocaps
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I think the MS word example from habitatchronicles.com/2017/05/what-a is much better, and that's what made it click for me. Although that was also the first thing I read on it so maybe there's something better
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To explain attenuation you just explain it in the context of like a pdf viewer or something (the viewer can't write but only read)

