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FORMES seminar, Fri, 19 Jun 2009 10:30

Title： On Measurement of Trust Transitivity

Venue： Tsinghua University, FIT Building, Room 3-125

Speaker： Dr. Yixiang Chen ，Affiliation, Shanghai Key Lab of Trustworthy Computing
East China Normal University

There have several models to compute the transtive degree of trusts in a
trustnetwork such as BBK-scheme and subjective logic approach.

In this presentation, we use the reals in the unit interval [0,1] to define
trust degrees. The larger its trust degree is, the more it is trustworthy.
Conversely, the smaller its trust value is, the less it is trustworthy. So, If
A trusts B by 100% then we can say that A is to trust B, while if A trusts B by
0% then we say that A is to distrust B. Thus if A trusts B by 50%, then we do
not know whether or not A trusts B. The value of half is uncertain for the
trustworthiness.