Page 267 - Trust in ICT 2017

Trust in ICT 5

Appendix III

Trust provisioning use cases
(This appendix does not form an integral part of this Recommendation.)

This appendix provides trust provisioning use cases in ICT infrastructures and services. In this appendix, five
use cases are introduced: peer-to-peer accommodation, smart office sharing, document sharing service,
intermediate device selection for device-to-device environment, and used car sharing service. Each use case
describes following items:
– Description: describes its background including high level description and illustration;
– Actors: play a role in each use case;
– Service flow: describes a detailed service flow for each use case.

III.1 Trustworthy Peer-to-Peer Accommodation service
III.1.1 Description

This use case shows a peer-to-peer accommodation service scenario when a peer-to-peer accommodation
service provider connects hosts (vendors of rooms/accommodations) and travellers. Hosts provide their
available rooms through the service provider, and travellers choose rooms based on price, grade of facilities,
review scores, etc. When a traveller chooses the room a host will make decision whether accept the traveller
or not. During this transaction, there are three trust of entities: i) trust of the accommodation, ii) trust of the
host, and iii) trust of the traveller. Trust information provider collects data, which can be utilized for
calculating trust index, and provides trust index to all entities. Figure III.1 shows high level illustration of a
peer-to-peer accommodation scenario. This use case example illustrates how trust information (including
trust index) is applied to of service provider, users (host and traveller), and accommodation facility by
showing how trust index of each actor is accumulated and managed during transaction.

Figure III.1 – High level illustration for peer-to-peer accommodation scenario

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