Page 190 - Trust in ICT 2017

3 Trust in ICT

A Service Domain
Multiple Trust Domains
ICT Infrastructure
Trust Domain A Trust Domain B Trust Domain C
Social Domain
Social
Social QoT
Component Trust Class 3

Cyber Domain
Cyber Cyber QoT
Cyber
Component Trust Trust Class 2

Physical Domain
Physical Physical Physical QoT
Physical Class 1
Component Trust Trust Trust
An Example
of Different
Level of Trust Trust-based ICT Service through TLA Classes of
High QoT

Low

Figure 7-2 – An example of QoT and TLA among multiple trust domains

From the concepts of trust domains in the previous figure, Figure 7-3 illustrates several interactions among
entities for trust provisioning in a real world. These interactions are based on trust relationships of each entity
in social, cyber and physical domains according to different classes of QoT.

Figure 7-3 – Illustration of interactions among entities for trust provisioning in a real world

7.3 Key challenges for trust provisioning

This clause describes key challenges for trust provisioning for ICT infrastructures.

Trust relationship may be human to human, object to object (e.g., handshake protocols negotiated), human
to object (e.g., when a consumer reviews a digital signature advisory notice) or object to human (e.g., when

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