scope:

This Recommendation provides a trust index model for information and communication technology (ICT) infrastructures and services. A trust index is a composite and relative value that combines multiple trust indicators for representing trust of an entity quantitatively into one benchmark measure to help decision-making of stakeholders through identifying characteristics of entities in ICT environments. More specifically, this draft Recommendation covers the following:

- The importance of the trust and trust value chain in ICT environment;

- The necessity of a trust index for trust provisioning;

- A list and detailed description of trust indicators for obtaining trust index;

- An application of a trust index.

This Recommendation provides a generic, flexible approach to the evaluation of trust. It does not specify the mechanics for trust index calculation or the underlying decision-making process based on trust. Use of trust, and the supporting trust evaluation, are specific to a particular application or network setting. As a result, detailed trust evaluation algorithms and methods, and the application of those calculations, are out of scope for this Recommendation.