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Trust scenarios | | |
 E-commerce
web service
 Use-case: online software purchase
This case is pure information; no physical delivery
Use-case: book purchase
The purchaser is presumed to know that they want a particular book. Adds element of physical delivery
Use-case: laptop purchase
The purchaser wishes to purchasea laptop meeting certain requirements, but doesn't know what model. Adds element of rating service.
Use-case: online auction
Online auction, adds element of negotiation.
Extension to brokerage/composition...
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